+高级检索
钛合金β晶粒生长规律及晶粒尺寸对损伤容限性能的影响
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:


β-Grain Growth and Influence of Its Grain Size on Damage-Tolerance Property in Titanium Alloy
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    分别对a+b 两相区及b单相区锻造的TC4合金在相变点以上温度保温,然后对不同温度条件下原始b晶粒尺寸进行统计,并测试了几种不同晶粒尺寸下的疲劳裂纹扩展速率及断裂韧性。晶粒尺寸统计结果显示:原始b晶粒尺寸不仅与热处理温度和时间有关,也与锻造工艺有关。原始b晶粒尺寸与保温时间呈指数关系;在1 h条件下原始b晶粒尺寸并不总是随温度的升高一直增大,在某个温度范围内有一极值;锻造工艺不同,原始b晶粒尺寸波动也不同。从晶粒生长的热力学及动力学两方面对上述现象进行了分析。力学性能结果显示晶粒尺寸对裂纹扩展速率及断裂韧

    Abstract:

    The purpose of the present study is to know the influences of thermo-mechanical processing and heat-treatment on the prior b-grain size of TC4 titanium alloy, and the influence of grain size on damage-tolerance properties is also discussed. The average b-grain sizes under different thermo-mechanical processing and solution treatment conditions were measured. Noticeable difference of b-grain growth behavior was found between α+b forged and b forged TC4 alloy under the same heat-treatment conditions. The exponential relationship between b-grain size and solution time was presented. The results show that b-grain size does not always increase with increasing of solution-treatment temperature; a limit value of the grain size will appear in certain temperature region. For different forging process, the fluctuation of the prior b -grain size is different. This phenomenon is discussed in terms of grain growth thermodynamics and kinetics laws. Damage-tolerance properties results show that grain size has noticeable influence on fatigue crack growth rate and fracture toughness property.

    参考文献
    相似文献
    引证文献
引用本文

马英杰,刘建荣,雷家峰,刘羽寅,杨 锐.钛合金β晶粒生长规律及晶粒尺寸对损伤容限性能的影响[J].稀有金属材料与工程,2009,38(6):976~981.[Ma Yingjie, Liu Jianrong, Lei Jiafeng, Liu Yuyin, Yang Rui.β-Grain Growth and Influence of Its Grain Size on Damage-Tolerance Property in Titanium Alloy[J]. Rare Metal Materials and Engineering,2009,38(6):976~981.]
DOI:[doi]

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2008-06-21
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期:
  • 出版日期: