Microstructure Evolution and Mechanical Properties of Ti-6Al-4Zr-4Nb Alloys Fabricated by Spark Plasma Sintering (SPS)

被引：0
作者：
Liang, S. J. [1 ]
Matsunaga, S. [1 ]
Toda, Y. [2 ]
Matsunaga, T. [3 ]
Yamabe-Mitarai, Y. [1 ]
机构：
[1] Univ Tokyo, Grad Sch Frontier Sci, Dept Adv Mat Sci, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778561, Japan
[2] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
[3] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Yoshinodai 3-1-1,Chuo Ku, Sagamihara, Kanagawa 2525210, Japan
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2024年 / 55卷 / 07期
关键词：
HIGH-TEMPERATURE; CREEP-BEHAVIOR; TITANIUM; LASER; DEFORMATION; PARAMETERS;
D O I：
10.1007/s11661-024-07422-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The near-alpha Ti-6Al-4Zr-4Nb (wt pct) alloy is a recently developed alloy with potential for aerospace applications. This study evaluates the microstructure and mechanical properties of Ti-6Al-4Zr-4Nb produced by spark plasma sintering (SPS). The SPS samples sintered in the alpha + beta regions exhibited equiaxed alpha with a neighboring thin beta phase. Above the beta-transus temperature, the alpha/beta lamellar structure formed, allowing control of the grain size (100 similar to 200 mu m). The compressive strength and the creep property of the SPS samples were compared with the LBPDed and the forged samples. The compressive strength of the SPS sample was lower than that of the LPBFed sample but similar to the forged sample. The SPS samples exhibited longer creep rupture life (2220 hours) than LPBFed samples (1730 hours), but shorter than the forged sample (4109 hours). The creep deformation mechanism of the lamellar structure in the SPS sample was dislocation creep.
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页码：2544 / 2554
页数：11
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