金属热处理 ›› 2020, Vol. 45 ›› Issue (5): 17-22.DOI: 10.13251/j.issn.0254-6051.2020.05.004

• 组织与性能 • 上一篇    下一篇

GH2909合金锻件持久缺口敏感性组织分析

李钊1, 王涛1, 徐雄1,2, 罗俊鹏3, 盛俊英3   

  1. 1. 中国航发北京航空材料研究院 先进高温结构材料重点实验室, 北京 100095;
    2. 北京科技大学 冶金与生态工程学院, 北京 100083;
    3. 中国航发南方工业有限公司, 湖南 株洲 412002
  • 收稿日期:2020-02-19 出版日期:2020-05-25 发布日期:2020-09-02
  • 作者简介:李 钊(1985—),男,工程师,硕士,主要研究方向为高温合金,E-mail: gh720li@sina.com
  • 基金资助:
    装备预研重点实验室基金(6142903190205)

Structure analysis on stress rupture notch sensitivity for GH2909 alloy forgings

Li Zhao1, Wang Tao1, Xu Xiong1,2, Luo Junpeng3, Sheng Junying3   

  1. 1. Science and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China;
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    3. AECC South Industry Company Limited, Zhuzhou Hunan 412002, China
  • Received:2020-02-19 Online:2020-05-25 Published:2020-09-02

摘要: 针对GH2909合金锻件呈现的不同程度缺口敏感性问题,采用金相分析、扫描电镜、断口分析等手段,开展持久试样组织分析。结果表明:在某种特定的析出相分布状态下,GH2909合金是否呈现持久缺口敏感性是一个概率性事件;当Laves相连接成薄膜包覆晶界时,合金呈现缺口敏感性的概率显著提升。

关键词: GH2909合金, 缺口敏感性, 持久, 晶界

Abstract: Structure analysis on stress rupture specimens were conducted by the means of metallographic and SEM methods, to define the problem of different level notch sensitivity for GH2909 alloy forgings. The results show that whether the alloy exhibits persistent notch sensitivity is a probabilistic event to the GH2909 alloy with a particular phase distribution. The occurrence probability of notch sensitivity increases apparently when the Laves phase precipitates in film-like shape on grain boundary.

Key words: GH2909 alloy, notch sensitivity, rupture, grain boundary

中图分类号: