金属热处理 ›› 2021, Vol. 46 ›› Issue (8): 42-45.DOI: 10.13251/j.issn.0254-6051.2021.08.008

• 材料研究 • 上一篇    下一篇

Ti-22Al-27Nb合金的晶粒长大行为

秦春1,2, 李宁1, 董福元1, 李涌泉1   

  1. 1.北方民族大学 材料科学与工程学院, 宁夏 银川 750021;
    2.北方民族大学 粉体材料与特种陶瓷省部共建重点实验室, 宁夏 银川 750021
  • 收稿日期:2021-03-27 出版日期:2021-08-25 发布日期:2021-12-09
  • 作者简介:秦 春(1987—),男,讲师,博士研究生,主要研究方向为钛合金变形工艺及组织性能关系,E-mail:qinchun0131@163.com
  • 基金资助:
    国家自然科学基金(51804011);宁夏自然科学基金(2018AAC03119)

Grain growth behavior of Ti-22Al-27Nb alloy

Qin Chun1,2, Li Ning1, Dong Fuyuan1, Li Yongquan1   

  1. 1. School of Materials Science and Engineering, North Minzu University, Yinchuan Ningxia 750021, China;
    2. Key Laboratory of Powder Material & Advanced Ceramics, North Minzu University, Yinchuan Ningxia 750021, China
  • Received:2021-03-27 Online:2021-08-25 Published:2021-12-09

摘要: 通过测量Ti-22Al-27Nb合金的晶粒尺寸并进行拟合计算,研究了Ti-22Al-27Nb合金在不同等温退火温度及时间下的晶粒长大行为。结果表明,随着等温退火温度、时间的增加,Ti-22Al-27Nb合金的晶粒尺寸呈现增加的趋势,但随着等温退火时间的延长,晶粒尺寸的长大速度呈现降低的趋势。等温退火温度为1070 ℃,合金的晶粒长大生长指数为0.38;而当温度升高至1090 ℃时,生长指数达到了0.44。随着等温退火时间的增加,Ti-22Al-27Nb合金的晶粒长大激活能呈增加趋势,范围在132.8~267.2 kJ·mol-1

关键词: Ti-22Al-27Nb合金, 晶粒长大, 生长指数, 激活能

Abstract: Grain growth behavior of the Ti-22Al-27Nb alloy under different isothermal annealing temperatures and time was studied through measuring and calculating the grain size of the alloy. The results show that the grain size of the alloy increases with the increase of isothermal annealing temperature and time, while the grain growth rate decreases with the increase of isothermal annealing time. The grain growth index is 0.38 and 0.44 when the isothermal annealing temperature is 1070 ℃ and 1090 ℃ respectively. The grain growth activation energy of the Ti-22Al-27Nb alloy increases with the increase of isothermal annealing time, in the range of 132.8-267.2 kJ·mol-1.

Key words: Ti-22Al-27Nb alloy, grain growth, growth index, activation energy

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