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[1]李莹,周廉,林均品,等.高 Nb-TiAl 合金连续升温过程的组织演变[J].南京工业大学学报(自然科学版),2016,38(04):1-6.[doi:10.3969/j.issn.1671-7627.2016.04.001]
 LI Ying,ZHOU Lian,LIN Junpin,et al.Microstructure evolutions of high Nb-TiAl during continuous heating process[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(04):1-6.[doi:10.3969/j.issn.1671-7627.2016.04.001]
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高 Nb-TiAl 合金连续升温过程的组织演变()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年04期
页码:
1-6
栏目:
出版日期:
2016-07-10

文章信息/Info

Title:
Microstructure evolutions of high Nb-TiAl during continuous heating process
文章编号:
1671-7627(2016)04-0001-06
作者:
李莹1周廉1林均品2常辉1
1.南京工业大学 材料科学与工程学院 先进金属材料研究院,江苏 南京 210009; 2.北京科技大学 新金属材料国家重点实验室,北京 100083
Author(s):
LI Ying1ZHOU Lian1LIN Junpin2CHANG Hui1
1.Institute of Advanced Metal Materials,College of Materials Science and Engineering,Nanjing Tech University, Nanjing 210009,China; 2.State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China
关键词:
高Nb-TiAl合金 相变 连续升温 显微组织
Keywords:
high Nb-TiAl alloy phase transformation continuous heating microstructure
分类号:
TG146.2
DOI:
10.3969/j.issn.1671-7627.2016.04.001
文献标志码:
A
摘要:
采用光学显微镜(OM)、扫描电子显微镜(SEM)、X线衍射仪(XRD)、差热分析仪(DSC)和热膨胀仪(DIL)等研究高Nb-TiAl合金(Ti-45Al-8.5Nb-0.2W-0.2B-0.02Y,摩尔分数,%)在连续升温过程中的相变行为与显微组织演变。结果表明:高Nb-TiAl合金在升温过程中存在2个相变过程,①有序α2无序α相转变,②四方γ→α相扩散型转变; α2→α相转变结束后→α相转变开始前,显微组织的近片层团尺寸随温度升高而减小,板条间距随温度升高而增大; 随着温度的逐渐升高相在母相α相的晶界、边界处逐渐消失。
Abstract:
Phase transformation and microstructure evolutions of Ti-45Al-8.5Nb-0.2W-0.2B-0.02Y alloy during continuous heating were investigated using optical microscopy(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD),differential scanning calorimetry(DSC), and dilatometry(DIL). Results indicate that two phase transformations were taken place during continuous heating process:ordered α2→disorder α and tetragonal γα. After α2 transferred to α and before γ transferred to α,the near lamellar colonies decreased with the temperature increasing and the spacing size between laths increased with the temperature increasing.Meanwhile,with temperature increasing,γ phase disappeared on the grain boundaries and edges of parent α phase.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-08-04
基金项目:科技部国际科技合作专项(2015DFA51430); 江苏高校优势学科建设工程
作者简介:李莹(1985—),女,河南新乡人,博士生,主要研究方向为高Nb-TiAl合金相变动力学; 常辉(联系人),教授,E-mail:ch2006@njtech.edu.cn.
引用本文:李莹,周廉,林均品,等.高 Nb-TiAl 合金连续升温过程的组织演变[J].南京工业大学学报(自然科学版),2016,38(4):1-6..
更新日期/Last Update: 2016-07-10