Evolution of Microstructure and mechanical properties of selective laser melted Ti-5Al-5V-5Mo-3Cr after heat treatments

被引：64
作者：
Carlton, Holly D. [1 ]
Klein, Kyle D. [1 ]
Elmer, John W. [1 ]
机构：
[1] Lawrence Livermore Natl Lab, Mat Engn Div, 7000 East Ave,L-342, Livermore, CA 94550 USA
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2019年 / 24卷 / 05期
关键词：
X-ray diffraction; mechanical properties; beta-titanium alloys; additive manufacturing; welding; selective laser melting; metals; heat treatment; BETA-TITANIUM-ALLOY; BEAM WELDED TI-5AL-5V-5MO-3CR; ELECTRON-BEAM; ALPHA-PHASE; OMEGA-PHASE; TI-5553; TI; PRECIPITATION; DEFORMATION; METALLURGY;
D O I：
10.1080/13621718.2019.1594589
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Titanium alloy Ti5553 (Ti-5Al-5Mo-5V-3Cr) is an excellent candidate for structural applications and additive manufacturing processes, since, unlike Ti6Al4 V, when built via selective laser melting and/or post additive manufactured welding, it maintains a near-beta microstructure that is both ductile and high strength. Another feature is that Ti5553 properties are adaptable through post build heat treatment. This study explores the heat treatability of selective laser melted Ti5553 up to temperatures approaching the beta-transus. Results show strength increases while maintaining ductility at high temperatures (700-800 degrees C), but embrittlement occurs at intermediate temperatures (400-600 degrees C) likely due to changes in volume fraction and morphology of the alpha-phase and/or the presence of the omega-phase. Microstructure and X-ray diffraction are reported after heat-treating to better understand this mechanical response.
引用
收藏
页码：465 / 473
页数：9
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