Improved surface integrity of Ti6Al4V fabricated by selective electron beam melting using ultrasonic surface rolling processing

被引：27

作者：

Liu, Zhongqiang ^{[1
]}

Gao, Chaofeng ^{[1
]}

Liu, Xiao ^{[2
]}

Liu, Ruiping ^{[3
]}

Xiao, Zhiyu ^{[1
]}

机构：

[1] South China Univ Technol, Natl Met Near Net Forming Engn Technol Res Ctr, Guangzhou 510640, Guangdong, Peoples R China

[2] Henan Inst Technol, Sch Sci, Xinxiang 453003, Henan, Peoples R China

[3] Shenzhen YuanMeng Precis Technol Inst, Shenzhen 518055, Guangdong, Peoples R China

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2021年 / 297卷

关键词：

Selective electron beam melting; Ultrasonic surface rolling process; Surface integrity; Wettability; Ti6Al4V; FATIGUE PERFORMANCE; TI-6AL-4V ALLOY; TITANIUM; BEHAVIOR; FINISH; ROUGHNESS; WROUGHT; PARTS;

D O I：

10.1016/j.jmatprotec.2021.117264

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper investigates the effect of ultrasonic surface rolling processing (USRP) on the surface integrity, microstructure, hardness, and residual stress of selective electron beam melted (SEBMed) Ti6Al4V with as-built surface. Results show that the semi-melted powder and melting pool ridges are flattened due to the ultrasonic impact and static load, as well as surface defects, such as 'stairs' and holes, are eliminated. The surface integrity of the sample is significantly improved. The surface roughness Ra and Rz of the USRP treated sample with 800 N is reduced by -95 % and -90 %, the surface hardness is increased by -16.2 % compared with the as-built surface. A gradient microstructure and hardened layer exceeded 110 mu m is obtained. What's more, the surface wettability changes from hydrophobicity to hydrophily.

引用

页数：10

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