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

Sheng Cao, Qiaodan Hu, Aijun Huang, Zhuoer Chen, Ming Sun, Jiahua Zhang, Chenxi Fu, Qingbo Jia, Chao Voon Samuel Lim, Rodney R. Boyer, Yi Yang, Xinhua Wu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Static coarsening mechanism of selective laser melted (SLMed) Ti–6Al–4V with a lamellar microstructure was established at temperatures from 700 °C to 950 °C. 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 °C, 900 °C and 950 °C, respectively. This indicated the coarsening mechanism was bulk diffusion at 700–800 °C, and a combination of bulk diffusion and interface reaction at 900 °C and 950 °C conditions.

Original languageEnglish
Pages (from-to)1578-1586
Number of pages9
JournalJournal of Materials Science and Technology
Volume35
Issue number8
DOIs
Publication statusPublished - 1 Aug 2019

Keywords

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

Cite this

Cao, Sheng ; Hu, Qiaodan ; Huang, Aijun ; Chen, Zhuoer ; Sun, Ming ; Zhang, Jiahua ; Fu, Chenxi ; Jia, Qingbo ; Lim, Chao Voon Samuel ; Boyer, Rodney R. ; Yang, Yi ; Wu, Xinhua. / Static coarsening behaviour of lamellar microstructure in selective laser melted Ti–6Al–4V. In: Journal of Materials Science and Technology. 2019 ; Vol. 35, No. 8. pp. 1578-1586.
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title = "Static coarsening behaviour of lamellar microstructure in selective laser melted Ti–6Al–4V",
abstract = "Static coarsening mechanism of selective laser melted (SLMed) Ti–6Al–4V with a lamellar microstructure was established at temperatures from 700 °C to 950 °C. 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 °C, 900 °C and 950 °C, respectively. This indicated the coarsening mechanism was bulk diffusion at 700–800 °C, and a combination of bulk diffusion and interface reaction at 900 °C and 950 °C conditions.",
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author = "Sheng Cao and Qiaodan Hu and Aijun Huang and Zhuoer Chen and Ming Sun and Jiahua Zhang and Chenxi Fu and Qingbo Jia and Lim, {Chao Voon Samuel} and Boyer, {Rodney R.} and Yi Yang and Xinhua Wu",
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Static coarsening behaviour of lamellar microstructure in selective laser melted Ti–6Al–4V. / Cao, Sheng; Hu, Qiaodan; Huang, Aijun; Chen, Zhuoer; Sun, Ming; Zhang, Jiahua; Fu, Chenxi; Jia, Qingbo; Lim, Chao Voon Samuel; Boyer, Rodney R.; Yang, Yi; Wu, Xinhua.

In: Journal of Materials Science and Technology, Vol. 35, No. 8, 01.08.2019, p. 1578-1586.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Static coarsening behaviour of lamellar microstructure in selective laser melted Ti–6Al–4V

AU - Cao, Sheng

AU - Hu, Qiaodan

AU - Huang, Aijun

AU - Chen, Zhuoer

AU - Sun, Ming

AU - Zhang, Jiahua

AU - Fu, Chenxi

AU - Jia, Qingbo

AU - Lim, Chao Voon Samuel

AU - Boyer, Rodney R.

AU - Yang, Yi

AU - Wu, Xinhua

PY - 2019/8/1

Y1 - 2019/8/1

N2 - Static coarsening mechanism of selective laser melted (SLMed) Ti–6Al–4V with a lamellar microstructure was established at temperatures from 700 °C to 950 °C. 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 °C, 900 °C and 950 °C, respectively. This indicated the coarsening mechanism was bulk diffusion at 700–800 °C, and a combination of bulk diffusion and interface reaction at 900 °C and 950 °C conditions.

AB - Static coarsening mechanism of selective laser melted (SLMed) Ti–6Al–4V with a lamellar microstructure was established at temperatures from 700 °C to 950 °C. 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 °C, 900 °C and 950 °C, respectively. This indicated the coarsening mechanism was bulk diffusion at 700–800 °C, and a combination of bulk diffusion and interface reaction at 900 °C and 950 °C conditions.

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