Intermetallics最新文献_第5页

Achieving synergistic enhancement of wear resistance and plasticity in (TiB+Ti5Si3)/TC4 composites with dual quasi-continuous network structure via reinforcement content control 通过增强物含量控制，实现双准连续网状结构(TiB+Ti5Si3)/TC4复合材料耐磨性和塑性的协同增强

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-08 DOI: 10.1016/j.intermet.2026.109149

Shiqian Zhao , Chunyu Yue , Bowen Zheng , Feng Gu , Fuyu Dong , Xiaojiao Zuo , Xuejian Lin , Hongjun Huang , Wentao Zheng , Xiaoguang Yuan

This study in-situ fabricates (TiB + Ti₅Si₃)/TC4 composites with a dual quasi-continuous network structure through casting. The work systematically investigates the effects of the reinforced phase content on microstructure, mechanical properties, and tribological performance. Results show that Ti₅Si₃ particles significantly alter the microstructure. TiB whiskers transform from long acicular to short acicular morphology. Ti₅Si₃ particles precipitate at α/β phase interfaces and inside β phases. This precipitation behavior forms the dual quasi-continuous network structure. With increasing reinforced phase content, the mechanical properties and tribological performance undergo initial enhancement followed by degradation. The (3 vol% TiB+4 vol% Ti₅Si₃)/TC4 composite (S-3) demonstrates optimal comprehensive properties. Its hardness reaches 59.33 HRC, compressive strength hits 1875 MPa, and plasticity reaches 20.4 %. This composite also shows notable wear resistance. The strengthening mechanism involves matrix grain refinement, solid-solution strengthening, load transfer, thermal mismatch strengthening, and Orowan strengthening induced by reinforced phases. In addition, the reinforced phases hinder crack propagation, which enhances the composites’ plastic deformation capacity and wear resistance. This work proves that optimizing the TiB/Ti₅Si₃ ratio enables improvement of the properties of titanium matrix composites. It provides a theoretical basis for designing composites with high strength, high plasticity, and favorable wear resistance.

本研究采用原位铸造法制备了具有双准连续网状结构的(TiB + Ti5Si3)/TC4复合材料。本文系统地研究了增强相含量对微观结构、力学性能和摩擦学性能的影响。结果表明，Ti5Si3颗粒显著改变了合金的显微组织。TiB晶须由长针状变为短针状。Ti5Si3颗粒在α/β相界面和β相内部析出。这种沉淀行为形成了双准连续网络结构。随着增强相含量的增加，材料的力学性能和摩擦学性能呈现先增强后退化的趋势。（3vol % TiB+ 4vol % Ti5Si3）/TC4复合材料（S-3）表现出最佳的综合性能。硬度达到59.33 HRC，抗压强度达到1875 MPa，塑性达到20.4%。这种复合材料也显示出显著的耐磨性。强化机制包括基体晶粒细化、固溶强化、载荷传递、热失配强化和增强相诱导的Orowan强化。增强相阻碍了裂纹扩展，增强了复合材料的塑性变形能力和耐磨性。本工作证明了优化TiB/Ti5Si3的比例可以改善钛基复合材料的性能。为设计高强度、高塑性、良好耐磨性的复合材料提供了理论依据。

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引用次数: 0

Divergent machinability and deformation mechanisms in directed energy deposited CrCoNi and (CrCoNi)94Al3Ti3 medium-entropy alloys 定向能沉积CrCoNi和（CrCoNi）94Al3Ti3中熵合金的可加工性及变形机制

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-16 DOI: 10.1016/j.intermet.2026.109162

Chunyu Tong , Zekai Liu , Ting Yue , Sulin Chen , Bin Shen

Although medium-entropy alloys (MEAs) fabricated by additive manufacturing hold great industrial potential, the fundamental role of Al/Ti alloying in machining-induced subsurface deformation remains unexplored. This study systematically investigates the machinability and deformation mechanisms of CrCoNi and (CrCoNi)₉₄Al₃Ti₃ alloys fabricated via directed energy deposition (DED) through an integrated analysis of the cutting forces, surface integrity, and EBSD-based subsurface characterization. Compared to CrCoNi, (CrCoNi)₉₄Al₃Ti₃ exhibits 11.8 % higher cutting forces, which is associated with enhanced resistance to plastic deformation arising from grain refinement and Al/Ti-enriched microstructural features, while achieving an 18.3 % lower surface roughness due to strain hardening that suppresses lateral material flow. The non-monotonic cutting-force behavior under a constant material removal rate is interpreted as a transition from compression-dominated ploughing to shear-dominated chip formation. Fundamental differences in subsurface mechanisms were revealed: CrCoNi developed stress-relieving recrystallization with gradient grains, whereas (CrCoNi)₉₄Al₃Ti₃ exhibited 70.4 % higher near-surface strain hardening owing to dislocation accumulation. Optimal parameters (v_c = 1000 mm/s, f_z = 0.05 mm/z, a_p = 0.15 mm) were identified to simultaneously maximize the machining efficiency and surface quality. These findings provide new insights into alloy design for machinability by elucidating how Al/Ti modification alters the deformation pathways in additively manufactured MEAs during cutting, thereby offering practical guidelines for the precision manufacturing of complex components.

虽然增材制造制造的中熵合金（MEAs）具有巨大的工业潜力，但Al/Ti合金在加工诱发的地下变形中的基本作用仍未被探索。本研究通过对切削力、表面完整性和基于ebsd的亚表面表征的综合分析，系统地研究了定向能沉积（DED）制备的CrCoNi和（CrCoNi）94Al3Ti3合金的可加工性和变形机制。与CrCoNi相比，（CrCoNi）94Al3Ti3的切削力提高了11.8%，这与晶粒细化和Al/ ti丰富的显微组织特征引起的塑性变形的抵抗能力增强有关，而由于抑制材料横向流动的应变硬化，表面粗糙度降低了18.3%。恒定材料去除率下的非单调切削力行为被解释为从压缩主导的犁耕到剪切主导的切屑形成的转变。在亚表面机制上的根本差异揭示了：CrCoNi发生了梯度晶粒的应力消除再结晶，而（CrCoNi）94Al3Ti3由于位错积累而表现出70.4%的近表面应变硬化。确定了最优加工参数（vc = 1000 mm/s, fz = 0.05 mm/z, ap = 0.15 mm），以最大限度地提高加工效率和表面质量。这些发现通过阐明Al/Ti改性如何改变增材制造mea在切削过程中的变形路径，为合金可加工性设计提供了新的见解，从而为复杂部件的精密制造提供了实用指南。

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引用次数: 0

Mechanistic insights into direction-modulated electromigration failures and intermetallic formation in symmetric/asymmetric SnAg solder microbumps 对称/非对称SnAg焊料微凸点中方向调制电迁移失效和金属间形成的机理

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-10 DOI: 10.1016/j.intermet.2026.109160

Dinh-Phuc Tran , Tzu-Chieh Pan , Shi-Chi Yang , Mai-Phuong La , Chih Chen

With the growing adoption of advanced flip-chip–based vertical stacking packaging technology, solder microbumps are required to shrink to accommodate higher input/output density. However, the increased current density intensifies electromigration (EM)-induced damage, thus compromising chip reliability. In this study, we elucidate the failure mechanisms of asymmetric (Cu/SnAg/Ni/Cu) and symmetric (Cu/SnAg/Cu) microbump structures under EM tests. Results showed that, under the comparable EM test, the asymmetric Cu/SnAg/Ni/Cu structure exhibited more severe EM-induced degradation than the symmetric Cu/SnAg/Cu structure. Cross-sectional analyses were also conducted to further correlate the under-bump-metallization (UBM) dissolution rates, void formation, and failure time. We found that the symmetric structure demonstrated a longer failure time, while the asymmetric solder joint exhibited a higher UBM dissolution rate and void ratio. In the symmetric joints, UBM degradation and void growth occurred primarily on the cathode side, governed by EM direction. In contrast, the asymmetric counterparts experienced additional effects from thermomigration and chemical potential gradients, causing UBM dissolution and severe void formation on the side without a Ni diffusion barrier layer.

随着先进的基于倒装芯片的垂直堆叠封装技术的日益普及，焊料微凸点需要缩小以适应更高的输入/输出密度。然而，电流密度的增加加剧了电迁移（EM）引起的损伤，从而降低了芯片的可靠性。在这项研究中，我们阐明了不对称（Cu/SnAg/Ni/Cu）和对称（Cu/SnAg/Cu）微碰撞结构在EM测试下的破坏机制。结果表明，不对称的Cu/SnAg/Ni/Cu结构比对称的Cu/SnAg/Cu结构表现出更严重的EM诱导降解。还进行了横断面分析，以进一步关联碰撞下金属化（UBM）溶解速率、空洞形成和失效时间。结果表明，对称焊点的失效时间较长，而非对称焊点的UBM溶解速率和空隙率较高。在对称节理中，UBM降解和孔洞生长主要发生在阴极侧，受电磁方向支配。相反，不对称材料则受到热迁移和化学势梯度的额外影响，导致UBM溶解，并在没有Ni扩散阻挡层的一侧形成严重的空洞。

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引用次数: 0

Influence of Al and Ti on precipitation behavior and corrosion resistance in CoCrNi alloys Al和Ti对CoCrNi合金析出行为和耐蚀性的影响

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-16 DOI: 10.1016/j.intermet.2026.109168

M.K. Xu, A.X. Li, K.W. Kang, S.B. Yu, S.K. Liu, Y.T. Jiang, B.R. Zhang, Y.Q. Li, G. Li

This study explores the corrosion behavior of CoCrNi(AlTi)_x medium entropy alloys with varying Al and Ti additions (x = 0, 0.05, 0.10, 0.15), focusing on the influence of L1₂ precipitates in Cl rich environments. Electrochemical tests in 3.5 wt% NaCl solution demonstrate that the alloy with moderate AlTi content (x = 0.05) exhibits the best corrosion resistance, characterized by a corrosion current density of 45 ± 6 nA/cm², a pitting potential of 857 ± 13 mV (vs. Ag/AgCl), and an extended passivation region spanning approximately 0.5–1.6 V (vs. Ag/AgCl). Increasing the AlTi concentration leads to a higher volume fraction of L1₂ precipitates, which correlates with increased corrosion current densities and reduced passivation stability. These variations in electrochemical performance are attributed to changes in precipitate distribution and their effect on passive film stability under Cl⁻. The findings highlight the critical role of controlled L1₂ precipitation in optimizing corrosion resistance in CoCrNi alloys.

本研究探讨了不同Al和Ti添加量（x = 0, 0.05, 0.10, 0.15）下CoCrNi(AlTi)x中熵合金的腐蚀行为，重点研究了在富Cl环境中L12析出物的影响。在3.5 wt% NaCl溶液中的电化学测试表明，AlTi含量（x = 0.05）中等的合金具有最佳的耐蚀性，腐蚀电流密度为45±6 nA/cm2，点蚀电位为857±13 mV（相对于Ag/AgCl），钝化区扩展约为0.5-1.6 V（相对于Ag/AgCl）。AlTi浓度的增加导致L12析出相体积分数的增加，这与腐蚀电流密度的增加和钝化稳定性的降低有关。这些电化学性能的变化归因于沉淀分布的变化及其对Cl−下钝化膜稳定性的影响。研究结果强调了控制L12析出对优化CoCrNi合金耐蚀性的关键作用。

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引用次数: 0

Effect of microstructure evolution on the mechanical performance of Fe49CrxCo9.8Ni39.2-xAl2 high-entropy alloys 组织演变对Fe49CrxCo9.8Ni39.2-xAl2高熵合金力学性能的影响

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-05 DOI: 10.1016/j.intermet.2025.109146

Chengxu Wang , Lin Zhou , Zhongli Liu , Xiangkui Liu

Here, we successfully synthesized a variety of Fe₄₉Cr_xCo_9.8Ni_39.2-xAl₂ (x = 27.4, 28.4, 29.4 at%) eutectic or near-eutectic high-entropy alloys (HEAs) through directly casting. As the Cr content increases from 27.4 at% to 29.4 at%, the volume fraction of FCC phase shows a gradual decreasing trend, while the BCC phase demonstrates a gradual increasing trend. The studied HEAs display outstanding mechanical properties within a specific composition range, surpassing many other eutectic HEAs (EHEAs). Particularly, the as-cast Fe₄₉Cr_28.4Co_9.8Ni_10.8Al₂ HEA presents a duplex eutectic microstructure and exhibits remarkable mechanical performance. Specifically, the yield strength and the ultimate tensile strength reach 632 MPa and 823 MPa. And the fracture elongation maintains 25.1 %. Such outstanding mechanical properties primarily due to grain boundary strengthening, phase interface strengthening and precipitation strengthening. The design strategy offers promising insights for the design of high-performance alloys.

在此，我们成功地通过直接铸造合成了Fe49CrxCo9.8Ni39.2-xAl2 （x = 27.4, 28.4, 29.4 at%）共晶或近共晶高熵合金（HEAs）。随着Cr含量从27.4 at%增加到29.4 at%， FCC相的体积分数呈逐渐减小的趋势，BCC相的体积分数呈逐渐增大的趋势。所研究的HEAs在特定的组成范围内表现出优异的力学性能，超过了许多其他共晶HEAs （EHEAs）。铸态fe49cr28 .4 co9.8 . ni10 .8 al2 HEA呈现双共晶组织，具有优异的力学性能。其中屈服强度和极限抗拉强度分别达到632 MPa和823 MPa。断裂伸长率保持在25.1%。这种优异的力学性能主要是由于晶界强化、相界面强化和析出强化。该设计策略为高性能合金的设计提供了有希望的见解。

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引用次数: 0

Composition-dependent design rules for BCC phase stability in AlCoCrFeNi high-entropy Alloys: Insights from an integrated DFT–MD–ML framework AlCoCrFeNi高熵合金中BCC相稳定性的成分依赖设计规则：来自集成DFT-MD-ML框架的见解

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-05 DOI: 10.1016/j.intermet.2025.109143

Dong-Yeh Wu , Shin-Pon Ju , Che-Hsin Lin , Bo-Shiuan Li , Pin-Xiang Huang

The prediction of phase stability in multi-principal-element alloys remains a critical challenge in physical metallurgy. Here, we establish quantitative design rules for body-centered cubic (BCC) phase stability in AlCoCrFeNi high-entropy alloys through a fully computational approach that integrates density functional theory (DFT), deep learning potential (DLP), molecular dynamics (MD), and machine learning (ML). Using a curated dataset of over 1400 alloy compositions, our trained models achieve a validation accuracy of ∼88 % and an external test-set AUC above 0.94. The resulting stability maps reveal empirical composition windows—namely, Al + Cr ≥ 0.30, Co + Ni ≤ 0.30, and total concentration 0.45 ≤ x ≤ 0.60—that consistently promote BCC formation. These trends are consistent with reported experimental phase observations in Al–Co–Cr–Fe–Ni systems, thereby bridging computational prediction with metallurgical design. Our results provide not only an efficient route to accelerate alloy exploration but also physically interpretable rules that advance fundamental understanding of phase stability in high-entropy intermetallic systems.

多主元素合金的相稳定性预测一直是物理冶金领域的一个重大挑战。本文采用密度泛函理论（DFT）、深度学习势（DLP）、分子动力学（MD）和机器学习（ML）相结合的全计算方法，建立了AlCoCrFeNi高熵合金体心立方（BCC）相稳定性的定量设计规则。使用超过1400种合金成分的精选数据集，我们训练的模型实现了~ 88%的验证精度和超过0.94的外部测试集AUC。结果表明，Al + Cr≥0.30,Co + Ni≤0.30，总浓度0.45≤x≤0.60的经验组成窗口持续促进BCC的形成。这些趋势与Al-Co-Cr-Fe-Ni体系的实验相观察结果一致，从而将计算预测与冶金设计联系起来。我们的研究结果不仅为加速合金勘探提供了有效途径，而且还提供了物理解释规则，促进了对高熵金属间体系相稳定性的基本理解。

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引用次数: 0

The influence of precipitates on the indentation creep behavior of (CoCrFeNi)94Ti2Al4 alloy 析出相对（CoCrFeNi）94Ti2Al4合金压痕蠕变行为的影响

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-21 DOI: 10.1016/j.intermet.2026.109169

Jiaohui Yan , Fei Hou , Lei Li , Di Wan , Xun Guo , Ke Jin , Yunfei Xue

This study investigates the influence of precipitate size on the room-temperature indentation creep behavior of (CoCrFeNi)₉₄Ti₂Al₄ high-entropy alloy by using nanoindentation system equipped with Berkovich diamond indenter combined with microstructural characterization. Nano-hardness, creep displacement, and creep strain rate of specimens with different sizes of nanoscale precipitates were analyzed under conditions of a 20 mN peak load and a 0.5 mN/s loading rate. Results show that precipitate refinement enhances the alloy hardness and reduces the total creep depth, while the steady-state creep rate increases slightly with an insignificant increment. When the testing conditions (loading rate and peak load) were changed, although the trend of inhibiting total creep displacement by precipitate refinement remained unchanged, the effect of precipitate refinement on the steady-state creep rate was not significant. Additionally, creep analysis using a spherical indenter were conducted to calculate the creep stress exponent n. Results showed that the precipitate-containing alloy exhibited a higher n value than the precipitate-free alloy, with dislocation creep identified as the dominant deformation mechanism in both cases. This study enables rapid screening of materials via nanoindentation creep, provides deeper mechanistic insights into the creep deformation of precipitation-strengthened high-entropy alloys, and establishes a theoretical framework for property optimization.

采用配备Berkovich金刚石压头的纳米压痕系统结合显微组织表征，研究了析出相尺寸对（CoCrFeNi）94Ti2Al4高熵合金室温压痕蠕变行为的影响。在峰值载荷为20 mN、加载速率为0.5 mN/s的条件下，分析了不同尺寸纳米析出物试样的纳米硬度、蠕变位移和蠕变应变率。结果表明：析出相细化提高了合金硬度，降低了总蠕变深度，而稳态蠕变速率略有增加，但增幅不显著；当试验条件（加载速率和峰值载荷）发生变化时，虽然析出相细化抑制总蠕变位移的趋势保持不变，但析出相细化对稳态蠕变速率的影响不显著。此外，利用球面压头进行蠕变分析，计算蠕变应力指数n。结果表明，含析出相合金的n值高于无析出相合金，位错蠕变是两种情况下的主要变形机制。该研究使通过纳米压痕蠕变快速筛选材料成为可能，为沉淀强化高熵合金的蠕变变形提供了更深入的机理见解，并为性能优化建立了理论框架。

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引用次数: 0

Effects of palladium substitution on structural evolution and electrochemical properties of BCC solid solution alloys coexisting with Laves phase 钯取代对Laves相共存的BCC固溶体合金结构演变及电化学性能的影响

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-17 DOI: 10.1016/j.intermet.2026.109161

ZhiYuan Cao , GuangBo Shi , YaNan Fang , Kwo Young , HongMei Qiu , Muhammad Irfan Nawaz , Amjad Ali , Ghulam Murtaza , ChuBin Wan

In this study, a series of BCC solid solution hydrogen storage alloys coexisting with C14 Laves phase, Ti_13.6Zr_2.1V₄₄Cr_13.2Mn_6.9Fe_2.7Co_1.4Ni_15.7-xAl_0.3Pd_x (x = 0.5, 1.0, 1.5, and 2.0), were successfully synthesized and systematically investigated. The results indicate that the introduction of palladium can significantly modify the phase fractions of C14 and BCC, while simultaneously reducing the unit cell volume of the C14 phase. Electrochemical performance tests reveal that, within a specific palladium content range, the initial discharge capacity improves significantly, rising from ∼330 mAh/g in Pd_0.5 to ∼385 mAh/g in Pd_2.0. Regarding cycle stability, the Pd_1.5 alloy exhibits a capacity retention rate of 80 % after 200 cycles, significantly outperforming the 51 % retention of Pd_0.5. Additionally, Pd_1.5 exhibits the highest exchange current density (84.7 mA g⁻¹), the fastest hydrogen diffusion coefficient (15.4 × 10⁻¹⁰ cm² s⁻¹), and the lowest charge transfer resistance (3.9 Ohm), indicating the superior high-rate discharge capability in the studied alloys. These findings provide valuable guidance for the design of advanced hydrogen storage alloys and highlight their potential for practical fuel cell applications.

本研究成功合成了一系列与C14 Laves相共存的BCC固溶储氢合金ti13.6 zr2.1 v44cr13.2 mn6.9 fe2.7 co1.4 ni15.7 xal0.3 pdx (x = 0.5, 1.0, 1.5, 2.0)，并对其进行了系统的研究。结果表明，钯的引入可以显著改变C14和BCC的相分数，同时减小C14相的单位电池体积。电化学性能测试表明，在特定钯含量范围内，初始放电容量显著提高，从Pd0.5的~ 330 mAh/g提高到Pd2.0的~ 385 mAh/g。在循环稳定性方面，Pd1.5合金在200次循环后的容量保留率为80%，明显优于Pd0.5合金的51%保留率。此外，Pd1.5具有最高的交换电流密度（84.7 mA g−1）、最快的氢扩散系数（15.4 × 10−10 cm2 s−1）和最低的电荷转移电阻（3.9 Ohm），表明该合金具有优异的高倍率放电能力。这些发现为先进储氢合金的设计提供了有价值的指导，并突出了它们在实际燃料电池应用中的潜力。

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引用次数: 0

High performance Co-doped FeSiBC amorphous alloys for extreme aquatic environments 用于极端水生环境的高性能共掺杂FeSiBC非晶合金

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-19 DOI: 10.1016/j.intermet.2026.109173

Yijun Ding , Senkuan Meng , Jianfeng Wang , Xiaotong Sun , Hao Xie , Yiwei Liu , Xin Wang , Weimin Wang , Lina Hu , Zheng Wang

Corrosive conditions in extreme aquatic environments currently constrain the application of Fe-based amorphous alloys, which see extensive use in fields dedicated to dual carbon and energy efficiency due to their superior soft-magnetic properties. Enhancing the corrosion resistance of Fe-based amorphous alloys holds both scientific and engineering significance. In this work, new alloys with high corrosion resistance have been developed by Co doping on the basis of commercially available FeSiBC amorphous alloy. The Co-doped alloys exhibit a denser atomic arrangement and suppressed heterogeneous structural defects. These characteristics contribute to the formation of a more stable and corrosion-resistant passive film in corrosive media, composed of Fe and Co oxides. The strategy of enhancing the corrosion resistance of amorphous alloys through Co doping has been validated under extreme aquatic conditions, including high ion concentrations, elevated temperature and complex microbial environment. Moreover, the addition of Co helps maintain a high proportion of iron group elements, preserving the excellent magnetic properties and other advantages of Fe-based amorphous alloys. This dual-focus strategy, balancing practicality and functionality, holds significant value for engineering applications.

极端水环境中的腐蚀条件目前限制了铁基非晶合金的应用，由于其优越的软磁性能，铁基非晶合金在双碳和能源效率领域得到了广泛的应用。提高铁基非晶合金的耐腐蚀性能具有重要的科学意义和工程意义。本文在市售FeSiBC非晶合金的基础上，通过Co掺杂制备了具有高耐蚀性的新型合金。共掺杂合金表现出更致密的原子排列和抑制非均质结构缺陷。这些特性有助于在由Fe和Co氧化物组成的腐蚀性介质中形成更稳定和耐腐蚀的钝化膜。在高离子浓度、高温和复杂的水生微生物环境等极端条件下，通过Co掺杂提高非晶合金耐腐蚀性能的策略得到了验证。此外，Co的加入有助于保持铁族元素的高比例，保持铁基非晶合金优异的磁性能等优点。这种平衡实用性和功能性的双焦点策略对工程应用具有重要价值。

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引用次数: 0

High mechanical and tribological performance and mechanisms of TiZrHfNbAlx refractory high-entropy alloys TiZrHfNbAlx耐火高熵合金的高力学和摩擦学性能及其机理

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI: 10.1016/j.intermet.2026.109165

Yajuan Shi , Yi Wang

In this work, a series of TiZrHfNbAl_x (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) refractory high-entropy alloys (RHEAs) are synthesized by vacuum arc-melting techniques, and the effect of Al concentration on microstructure and wear properties were investigated. All alloys exhibit a single BCC structure. Interestingly, when x reaches 0.8, a new ordered BCC phase appears. As the increase in Al content, the hardness increased from 245 HV to 447 HV and the compressive yield strength (CYS) increased from 572 MPa to 1468 MPa for TiZrHfNb and TiZrHfNbAl_1.0 RHEAs, respectively. Meanwhile, the addition of Al significantly enhances the wear resistance of the RHEAs, the wear volume of TiZrHfNbAl_1.0 alloy decreased by 37.5 % in contrast with TiZrHfNb alloy. The above excellent performance of the TiZrHfNbAl_1.0 alloy was attributed to the synergistic effect of solid solution strengthening, ordered phase strengthening and a transformation of the wear mechanism.

采用真空电弧熔炼技术合成了一系列TiZrHfNbAlx （x = 0,0.2, 0.4, 0.6, 0.8, 1.0）耐火高熵合金（RHEAs），研究了Al浓度对合金组织和磨损性能的影响。所有合金均呈现单一的BCC结构。有趣的是，当x达到0.8时，出现了一个新的有序的BCC阶段。随着Al含量的增加，TiZrHfNb和TiZrHfNbAl1.0合金的硬度从245 HV增加到447 HV，抗压屈服强度（CYS）分别从572 MPa增加到1468 MPa。同时，Al的加入显著提高了合金的耐磨性，TiZrHfNbAl1.0合金的磨损体积比TiZrHfNb合金减少了37.5%。TiZrHfNbAl1.0合金的上述优异性能是固溶强化、有序相强化和磨损机理转变的协同作用的结果。

引用次数: 0