Investigation on ideal mechanical performance of laser direct energy deposited Ti-6Al-2Zr-1Mo-1V alloy without sub-β transus thermal cycles

被引：5
作者：
Li, Renkai [1 ,2 ,3 ]
He, Bei [1 ,2 ,3 ,4 ]
Wang, Huaming [1 ,2 ,3 ,4 ]
机构：
[1] Beihang Univ, Natl Engn Lab Addit Mfg Large Metall Components, 37 Xueyuan Rd, Beijing, Peoples R China
[2] Beihang Univ, Engn Res Ctr, Minist Educ Laser Direct Mfg Large Metall Compone, 37 Xueyuan Rd, Beijing, Peoples R China
[3] Beihang Univ, Beijing Engn Technol Res Ctr Laser Direct Mfg Lar, 37 Xueyuan Rd, Beijing, Peoples R China
[4] Beihang Univ, Res Inst Frontier Sci, 37 Xueyuan Rd, Beijing, Peoples R China
来源：
VACUUM | 2022年 / 203卷
基金：
中国国家自然科学基金;
关键词：
Laser deposition; Titanium; Microstructure; Mechanical properties; SITU TAILORING MICROSTRUCTURE; TITANIUM-ALLOY; HEAT-TREATMENT; TI-6AL-4V; PHASE; EVOLUTION; BEHAVIOR;
D O I：
10.1016/j.vacuum.2022.111303
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
One goal of metal additive manufacturing is to fabricate high-performance components without post processing. However, the last several deposited layers of as-deposited parts do not experience sub-beta transus thermal cycles, resulting in slight differences in microstructure and mechanical properties from other deposited layers. Finer a lath in titanium alloys generally gives increased strength and decreased ductility, while in this study, although laser direct energy deposited Ti-6Al-2Zr-1Mo-1V alloy without sub-beta transus thermal cycles exhibited finer a laths, it exhibited higher strength (921.0 +/- 1.0 MPa) and similar ductility (9.2 +/- 2.1%) compared to that with sub-beta transus thermal cycles (898.3 +/- 4.0 MPa/8.8 +/- 1.3%). The ideal ductility was mainly attributed to the enhanced stain hardening ability. This study indicated that the laser direct energy deposited parts had ideal mechanical properties in the as deposited state.
引用
收藏
页数：5
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