The microstructure and tensile properties of additively manufactured Ti-6Al-2Zr-1Mo-1V with a trimodal microstructure obtained by multiple annealing heat treatment

被引：44
作者：
Zhang, Sheng [1 ,2 ]
Zhang, Yuqi [1 ]
Zou, Zhiyi [3 ]
Shi, Yusheng [4 ]
Zang, Yong [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100089, Peoples R China
[2] Univ Sci & Technol Beijing, Shunde Grad Sch, Foshan 528300, Guangdong, Peoples R China
[3] Univ Nottingham, Ctr Addit Mfg, Nottingham NG8 1BB, England
[4] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2022年 / 831卷
关键词：
Laser powder bed fusion; Near-alpha Ti alloy; Multiple heat treatment; Microstructure; Mechanical properties; TRI-MODAL MICROSTRUCTURE; MECHANICAL-PROPERTIES; TITANIUM-ALLOY; HIGH-STRENGTH; TA15; ALLOY; TI-ALLOY; LASER; TI-6AL-4V; MARTENSITE; EVOLUTION;
D O I：
10.1016/j.msea.2021.142241
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Unlike acicular martensite, combining a lamellar and equiaxed alpha microstructure is known to impart high ductility for Ti-6.5Al-2Zr-1Mo-1V (TA15). In this article, we report innovative heat treatment aimed at opti-mizing the mechanical properties of additively manufactured TA15. After the proposed heat treatment, a tri-modal microstructure consisting of equiaxed alpha, lamellar alpha, and a transformed beta matrix was obtained. The resulting tensile properties were equivalent to those of forged TA15 counterparts. This paper discusses in detail the microstructure evolution involved in the heat treatment, as well as the microstructure-mechanical property relationships. The exceptional combination of strength and ductility obtained after the proposed heat treatment can allow the full exploitation of the additive manufacturing advantages of this excellent material.
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页数：10
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