Diverse microstructure of Ti6.5Al2Zr1Mo1V fabricated via electron beam selective melting

被引：9
作者：
Yang, Jixin [1 ,2 ]
Chen, Tian [1 ,3 ]
Huang, Yongjiang [1 ,2 ]
Li, Hongge [1 ,2 ]
Guo, Chao [4 ]
Sun, Jianfei [1 ,2 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China
[3] Chinese Acad Sci, Chongqing Key Lab Addit Mfg Technol & Syst, Chongqing Inst Green & Intelligent, Chongqing 400714, Peoples R China
[4] Tianjin SciTsinghua QuickBeam Tech Co Ltd, Tianjin 300300, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 304卷
关键词：
Diverse microstructure; Titanium alloys; Mechanical properties; Electron beam selective melting; Martensite phase; LASER; TI-6AL-4V; MARTENSITE;
D O I：
10.1016/j.matlet.2021.130597
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ti6.5Al2Zr1Mo1V was fabricated via electron beam selective melting (EBSM) with different process parameters to study the diversity of microstructure. Results demonstrate that samples with a flat surface can be obtained when the ratio of beam current to scanning speed fluctuated between 5.0 and 7.5 as other parameters were fixed. Basketweave structure and Widmanstatten structure were observed to co-exist in EBSM-built samples under different parameters, while martensite phase alpha ' was more likely to form under low beam current and high scanning speed. Samples with a mixture of (alpha ' + alpha + beta) phases possess a higher strength and lower plasticity than that with fully lamellar (alpha + beta) phases due to the stress concentration at the alpha '/beta interface in inhomogeneous microstructure.
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页数：4
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