Enhanced Ductility of a Bimodal Grain Structure Ti-22Al-25Nb Alloy Fabricated by Spark Plasma Sintering

被引：10
作者：
Sim, Kyong-Ho [1 ,2 ]
Wang, Guofeng [1 ]
Li, Yong-Min [2 ]
Jong, Ju-Yong [3 ]
机构：
[1] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China
[2] Kimchaek Univ Technol, Dept Mat Engn, Pyongyang 950003, North Korea
[3] Kim IL Sung Univ, Dept Energy Sci, Pyongyang 950003, North Korea
来源：
ADVANCED ENGINEERING MATERIALS | 2017年 / 19卷 / 06期
基金：
中国国家自然科学基金;
关键词：
TI-BASED COMPOSITES; MECHANICAL-PROPERTIES; MICROSTRUCTURAL EVOLUTION; HIGH-STRENGTH; TENSILE DUCTILITY; SIZE DISTRIBUTION; TI-6AL-4V ALLOY; LAMELLAR O; NANOCRYSTALLINE; BEHAVIOR;
D O I：
10.1002/adem.201600804
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A bimodal grain structure Ti-22Al-25Nb alloy with enhanced ductility is fabricated from the blended powder mixture of argon gas atomized powder and mechanically alloyed powder by spark plasma sintering. The microstructure of the bimodal grain structure Ti-22Al-25Nb alloy and the effects of the argon gas atomized powder mass fraction on the compression properties are investigated. This alloy shows the bimodal microstructure, which the coarse grain regions are surrounded by the ultrafine grained matrix. Compared with the Ti-22Al-25Nb alloy sintered from 100% mechanically alloyed powder, this alloy sintered from the blended powder mixture containing 20% argon gas atomized powder exhibits the fracture elongation to improve 20.5%.
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页数：8
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