S. Naumov, D. Panov, R. Chernichenko, V. Sokolovsky, M. Yapryntsev, D. Tagirov, G. Salishchev, V. Lukianov
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引用次数: 0
Abstract
In the present paper, the effect of diffusion bonding (DB) and post-bond heat treatment on a microstructure and mechanical properties of a Ti2AlNb-based alloy VTI-4 was studied. DB was carried out using an SPS 10–3 selective plasma sintering system. The optimum mechanical properties of DB-joints (σu = 1240 MPa, σ0.2 = 1070 MPa, δ = 4.6%) were achieved after DB at temperatures of 940°C and 960°C, a holding time of 120 minutes, and a pressure of 15–25 MPa. The obtained mechanical properties were equal to that of the initial material (σu = 1230 MPa, σ0.2 = 1190 MPa and δ = 3.5%, 400 ± 10 HV0.2). After DB at 940–960°C, microhardness was 395 ± 30 HV0.2, which was higher than that after DB at 920°C (360 ± 25 HV0.2). DB provoked an increase in the volume fraction of the O-phase along the joint interface compared to the base material. Post-bond heat treatment resulted in an additional increase in the volume fraction of the O-phase that increased strength and hardness.
期刊介绍：
Russian Journal of Non-Ferrous Metals is a journal the main goal of which is to achieve new knowledge in the following topics: extraction metallurgy, hydro- and pirometallurgy, casting, plastic deformation, metallography and heat treatment, powder metallurgy and composites, self-propagating high-temperature synthesis, surface engineering and advanced protected coatings, environments, and energy capacity in non-ferrous metallurgy.
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