Effect of heat-treatment on mechanical properties and high-temperature oxidation behavior of Hastelloy X fabricated by laser directed energy deposition

IF 5.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL Intermetallics Pub Date : 2026-04-01 Epub Date: 2026-01-23 DOI:10.1016/j.intermet.2026.109178

Guanghao Gong , Zifan Wang , Longjie Zhao , Fei Weng , Huijun Yu , Zhihuan Zhao , Chuanzhong Chen

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Abstract

In this study, the effect of heat-treatment on the microstructures, mechanical properties, and high-temperature oxidation behavior of Hastelloy X fabricated by laser directed energy deposition was investigated. The solution treatment dissolved Laves phases and increased the grain size resulting in a homogenized γ-matrix with improved ductility but reduced strength. The subsequent aging treatment precipitated fine M₂₃C₆, restoring strength and decreasing ductility. The oxidation tests conducted at 1000 °C up to 100 h revealed that the samples after heat-treatment exhibited a superior resistance due to the oxide consisted of continuous and dense Cr₂O₃ with outer spinels and less spallation behavior. The results reveal that the heat-treatment can achieve a balance between mechanical properties and oxidation resistance by tailoring the microstructures.

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热处理对激光定向能沉积哈氏合金X的力学性能和高温氧化行为的影响

研究了热处理对激光定向能沉积法制备的哈氏合金X的显微组织、力学性能和高温氧化行为的影响。固溶处理使Laves相溶解，晶粒尺寸增大，导致γ-基体均匀化，塑性提高，但强度降低。随后的时效处理析出细小的M23C6，恢复了强度，降低了塑性。在1000℃~ 100 h的温度下进行的氧化试验表明，热处理后的样品表现出优异的抗氧化性能，这是由于氧化物由连续致密的Cr2O3组成，外层有尖晶石，很少有剥落行为。结果表明，热处理可以通过调整组织来达到力学性能和抗氧化性能之间的平衡。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.