EBSD investigation on microstructure evolution of in-situ synthesized TiC/Ti6Al4V composite coating

被引：29
|
作者：
Zhang, Lizheng [1 ]
Zhao, Zhanyong [1 ]
Bai, Peikang [1 ]
Du, Wenbo [2 ]
机构：
[1] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China
[2] Acad Army Armored Forces, Natl Key Lab Remfg, Beijing 100072, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 290卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Laser processing; Microstructure; EBSD; Ti6Al4V; TiC;
D O I：
10.1016/j.matlet.2021.129449
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
TiC/Ti6Al4V composite coating was prepared by laser cladding. The effect of in-situ synthesized TiC on the microstructure evolution of Ti6Al4V was studied. The experimental results show that the average grain size of alpha-Ti in TiC/Ti6Al4V composite coating decreases obviously due to the TiC particles hinder grain growth. The proportion of low-angle grain boundary in TiC/Ti6Al4V composite coating is larger than that in Ti6Al4V coating, especially the similar to 2-5 degrees low-angle grain boundary. TiC particles effectively strengthen grain boundaries and refine grains leading to the formation of a large number of sub-grain boundaries. Moreover, the texture strength of alpha-Ti in TiC/Ti6Al4V composite coating was enhanced. TiC promotes the ordered arrangement of grains in the direction parallel to the Y-0 axis, resulting in texture and increase of grains. (C) 2021 Elsevier B.V. All rights reserved.
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页数：5
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