Microstructure and cellular transition characteristic of Ti-42Al-3Nb-1Mo-0.1B alloy

Hong Feng; Qi-bin Wang; Shu-zhi Zhang; Chang-jiang Zhang; Fu-yin Han; Ning Cui; Dong-dong Zhu; Duo Dong

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Microstructure and cellular transition characteristic of Ti-42Al-3Nb-1Mo-0.1B alloy

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The microstructure and cellular transition characteristics of an intermetallic Ti-42Al-3Nb-1Mo-0.1B (at.%) alloy were investigated.The as-cast microstructure of the alloy is mainly composed of (α2+γ) lamellar structure and (β+γ) mixture structure,which distributes along the boundaries of the lamellar colonies.In order to study the phase transformation of lamellar structure at aging temperature,a two-step heat treatment was carried out.After the first step of annealing treatment at 1,260 °C,the microstructure with relatively finer lamellar space and (γ+β/B2) mixture structure is obtained.Aging treatment,as the second heat treatment step,has significant influence on the microstructure,attributing to a cellular reaction of α2+γ→γ+β.With the increase of aging temperature,the (α2+γ) lamellar structure continues to dissolve,whereas the contents of both the equiaxed γ and β/B2 grains continuously increase.Besides,the orientation of lamellae α2,equiaxed γ and equiaxed β/B2 in the cellular transition region follows a specific relationship of {0-11}ββ//{0001}α2α2//{1-11}γγ.

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来源
《中国铸造：英文版》 |2020年第6期|423-428|共6页
作者
Hong Feng; Qi-bin Wang; Shu-zhi Zhang; Chang-jiang Zhang; Fu-yin Han; Ning Cui; Dong-dong Zhu; Duo Dong;
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作者单位

School of Materials Science and Engineering;

Taiyuan University of Technology;

Taiyuan 030024;

China;

Key Lab of Industrial Fluid Energy Conservation and Pollution Control;

Ministry of Education;

Qingdao University of Technology;

Qingdao 266520;

China;

Key Laboratory of Air-Driven Equipment Technology of Zhejiang Province;

Quzhou University;

Quzhou 324000;

China;

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原文格式 PDF
正文语种 chi
中图分类 TG146.23;
关键词
titanium aluminides; microstructure; cellular reaction; orientation relationship;

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1. Simulation of solidification microstructure of Fe-6.5Si alloy using cellular automaton-finite element method [J] . 宋炜 ,张炯明 ,王顺玺 . 中南大学学报 . 2016,第009期
2. Microstructures and Phase Transition Points of As-Cast Mg-Zn-Y System Alloys [J] . Feng Juanni Guo Xuefeng Xu Chunjie Zhang Zhongming . 稀土学报：英文版 . 2006,第1期
3. Microstructure Characteristics of Rapidly-Solidified/Melt-Spun AZ91 Alloy [C] . B.S. Wang ,Y.B. Liu ,Z.Y. Cao . 2008年全国博士生学术论坛（航空宇航科学与技术） . 2008
4. Microstructure and Properties ofγ-TiAl Based Alloys Fabricated by Selective Laser Melting Technique [A] . Adam Ismaeel Ibrahim . 2018

Microstructure and cellular transition characteristic of Ti-42Al-3Nb-1Mo-0.1B alloy

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