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On the grain boundary network characteristics in a martensitic Ti–6Al–4V alloy
Journal of Materials Science ( IF 4.5 ) Pub Date : 2020-07-30 , DOI: 10.1007/s10853-020-05075-7 Ehsan Farabi , Vahid Tari , Peter D. Hodgson , Gregory S. Rohrer , Hossein Beladi
Journal of Materials Science ( IF 4.5 ) Pub Date : 2020-07-30 , DOI: 10.1007/s10853-020-05075-7 Ehsan Farabi , Vahid Tari , Peter D. Hodgson , Gregory S. Rohrer , Hossein Beladi
The characteristics of the intervariant boundary network that resulted from the β→α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\beta \to \alpha^{\prime}$$\end{document} martensitic phase transformation in a Ti–6Al–4V alloy were studied using the crystallographic theories of displacive transformations, five-parameter grain boundary analysis and triple junction analysis. The microstructure of Ti–6Al–4V martensite consisted of fine laths containing dislocations and fine twins. The misorientation angle distribution revealed four distinct peaks consistent with the intervariant boundaries expected from the Burgers orientation relationship. The phenomenological theory of martensite predicted four-variant clustering to have the lowest transformation strain among different variant clustering combinations. This configuration was consistent with the observed Ti–6Al–4V martensitic microstructure, where four-variant clusters consisted of two pairs of distinct V-shape variants. The 63.26∘/[10¯553¯]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$63.26^\circ /[\overline{10}\, 5\, 5\, \overline{3}]_{{\alpha^{\prime}}}$$\end{document} and 60∘/[112¯0]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$60^\circ /[1\, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} intervariant boundaries accounted for ~ 38% and 33% of the total population, respectively. The five-parameter boundary analysis showed that the former had a twist character, being terminated on the (3¯210)α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\overline{3}\, 2\, 1\, 0)_{{\alpha^{\prime}}}$$\end{document} plane, and the latter revealed a symmetric tilt (101¯1)α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(1\, 0\, \overline{1}\, 1)_{{\alpha^{\prime}}}$$\end{document} boundary plane. The 63.26∘/[10¯553¯]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$63.26^\circ /[\overline{10}\, 5\, 5\, \overline{3}]_{{\alpha^{\prime}}}$$\end{document} and 60∘/[112¯0]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$60^\circ /[1\, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} had the highest connectivity at triple junctions among other intervariant boundaries. Interestingly, the boundary network in Ti–6Al–4V martensite was significantly different from the commercially pure Ti martensite, where only 60∘/[112¯0]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$60^\circ /[1\, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} intervariant boundaries largely were found at triple junctions due to the formation of three-variant clustering to minimize the transformation strain. This difference is thought to result from a change in the martensitic transformation mechanism (slip vs twinning) caused by the alloy composition.
中文翻译:
马氏体 Ti-6Al-4V 合金的晶界网络特征
由 β→α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage 产生的互变边界网络的特征{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\beta \to \alpha^{\prime}$$\end{document} Ti– 中的马氏体相变使用位移转变、五参数晶界分析和三结分析的晶体学理论研究了 6Al-4V 合金。Ti-6Al-4V 马氏体的显微组织由含有位错和细孪晶的细板条组成。错误取向角分布揭示了四个不同的峰,与 Burgers 取向关系所预期的互变边界一致。马氏体的现象学理论预测四变体聚类在不同变体聚类组合中具有最低的转化应变。这种配置与观察到的 Ti-6Al-4V 马氏体微观结构一致,其中四变体簇由两对不同的 V 形变体组成。63.26∘/[10¯553¯]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$63.26^\circ /[\overline{10}\, 5\, 5\, \overline{3}]_{{\alpha^{\prime}}}$$\end{document} 和 60∘/[112¯0]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \ usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$60^\circ / [1\, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} 互变边界占总人口的~38%和33%,分别。五参数边界分析表明,前者具有扭曲特征,终止于 (3¯210)α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \ usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\overline{3}\, 2\, 1\, 0)_{{\alpha^{\prime}}}$$\end{document} 平面,后者显示对称倾斜 (101¯1)α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(1\ , 0\, \overline{1}\, 1)_{{\alpha^{\prime}}}$$\end{document} 边界平面。63.26∘/[10¯553¯]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$63.26^\circ /[\overline{10}\, 5\, 5\, \overline{3}]_{{\alpha^{\prime}}}$$\end{document} 和 60∘/[112¯0]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \ usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$60^\circ / [1\, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} 在其他互变边界之间的三重连接处具有最高的连通性。有趣的是,Ti-6Al-4V 马氏体中的边界网络与商业纯钛马氏体显着不同,其中只有 60∘/[112¯0]α'\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{ wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$60^\circ /[1 \, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} 互变边界主要在三重连接处发现,这是由于形成了三变量聚类以最小化转换应变. 这种差异被认为是由合金成分引起的马氏体转变机制(滑移与孪晶)的变化引起的。
更新日期:2020-07-30
中文翻译:
马氏体 Ti-6Al-4V 合金的晶界网络特征
由 β→α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage 产生的互变边界网络的特征{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\beta \to \alpha^{\prime}$$\end{document} Ti– 中的马氏体相变使用位移转变、五参数晶界分析和三结分析的晶体学理论研究了 6Al-4V 合金。Ti-6Al-4V 马氏体的显微组织由含有位错和细孪晶的细板条组成。错误取向角分布揭示了四个不同的峰,与 Burgers 取向关系所预期的互变边界一致。马氏体的现象学理论预测四变体聚类在不同变体聚类组合中具有最低的转化应变。这种配置与观察到的 Ti-6Al-4V 马氏体微观结构一致,其中四变体簇由两对不同的 V 形变体组成。63.26∘/[10¯553¯]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$63.26^\circ /[\overline{10}\, 5\, 5\, \overline{3}]_{{\alpha^{\prime}}}$$\end{document} 和 60∘/[112¯0]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \ usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$60^\circ / [1\, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} 互变边界占总人口的~38%和33%,分别。五参数边界分析表明,前者具有扭曲特征,终止于 (3¯210)α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \ usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\overline{3}\, 2\, 1\, 0)_{{\alpha^{\prime}}}$$\end{document} 平面,后者显示对称倾斜 (101¯1)α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(1\ , 0\, \overline{1}\, 1)_{{\alpha^{\prime}}}$$\end{document} 边界平面。63.26∘/[10¯553¯]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$63.26^\circ /[\overline{10}\, 5\, 5\, \overline{3}]_{{\alpha^{\prime}}}$$\end{document} 和 60∘/[112¯0]α′\documentclass[12pt]{minimal} \usepackage{amsmath} \ usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$60^\circ / [1\, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} 在其他互变边界之间的三重连接处具有最高的连通性。有趣的是,Ti-6Al-4V 马氏体中的边界网络与商业纯钛马氏体显着不同,其中只有 60∘/[112¯0]α'\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{ wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$60^\circ /[1 \, 1\, \overline{2}\, 0]_{{\alpha^{\prime}}}$$\end{document} 互变边界主要在三重连接处发现,这是由于形成了三变量聚类以最小化转换应变. 这种差异被认为是由合金成分引起的马氏体转变机制(滑移与孪晶)的变化引起的。