Static coarsening behaviour of lamellar microstructure in selective laser melted Ti–6Al–4V

被引：9

作者：

Sheng Cao ^{[1
,2
]}

Qiaodan Hu ^{[3
]}

Aijun Huang ^{[1
,2
]}

Zhuoer Chen ^{[2
]}

Ming Sun ^{[4
]}

Jiahua Zhang ^{[1
]}

Chenxi Fu ^{[2
]}

Qingbo Jia ^{[2
]}

Chao Voon Samuel Lim ^{[2
]}

Rodney R.Boyer ^{[2
]}

Yi Yang ^{[1
]}

Xinhua Wu ^{[2
]}

机构：

[1] School of Materials Science and Engineering,University of Shanghai for Science and Technology

[2] Monash Centre for Additive Manufacturing (MCAM),Monash University

[3] School of Materials Science and Engineering,Shanghai Jiao Tong University

[4] School of Materials Science and Engineering (MCAM),University of Shanghai for Science and Technology

来源：

Journal of Materials Science & Technology | 2019年 / 35卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Selective laser melting; Ti–6Al–4V; Microstructure; Heat treatment;

D O I：

暂无

中图分类号：

TG665 [光能加工设备及其加工]; TG146.23 [];

学科分类号：

080201 ; 080502 ;

摘要：

Static coarsening mechanism of selective laser melted(SLMed) Ti–6Al–4V with a lamellar microstructure was established at temperatures from 700℃ to 950℃. Microstructure evolution revealed that high heat treatment temperature facilitated martensite decomposition and promoted lamellae growth. At each temperature, the growth rate decreased with increasing holding time. The static coarsening behaviour of SLMed Ti–6Al–4V can be interpreted by Lifshitz, Slyozov, and Wagner(LSW) theory. The coarsening coefficient were 0.33, 0.33–0.4, 0.4–0.5 for 700–800℃, 900℃ and 950℃, respectively. This indicated the coarsening mechanism was bulk diffusion at 700–800℃, and a combination of bulk diffusion and interface reaction at 900℃ and 950℃ conditions.

引用

页码：1578 / 1586

页数：9

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