Cracking Analysis of Powder Metallurgy Ti2AlNb Component During Heat Treatment

XU Lei; WU Jie; CUI Xiaoxiao; GUO Ruipeng; YANG Rui

doi:10.16080/j.issn1671-833x.2020.16.014

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Cracking Analysis of Powder Metallurgy Ti2AlNb Component During Heat Treatment

更新时间：2025-10-30

- Cracking Analysis of Powder Metallurgy Ti2AlNb Component During Heat Treatment
- Aeronautical Manufacturing Technology Vol. 63, Issue 16, Pages: 14-20(2020)
- 作者机构：
  
  1. 中国科学院金属研究所钛合金研究部,沈阳,110016
  2. 太原理工大学材料科学与工程学院,太原,030024
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2020.16.014
  CLC：
- Published：2020
- 稿件说明：
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徐磊，吴杰,崔潇潇，郭瑞鹏，杨锐. Ti2AlNb近净成形部件的热处理开裂分析[J]. 航空制造技术, 2020, 63(16): 14-20.

XU Lei,WU Jie,CUI Xiaoxiao,GUO Ruipeng,YANG Rui. Cracking Analysis of Powder Metallurgy Ti2AlNb Component During Heat Treatment. Aeronautical Manufacturing Technology, 2020, 63(16): 14-20.
徐磊，吴杰,崔潇潇，郭瑞鹏，杨锐. Ti2AlNb近净成形部件的热处理开裂分析[J]. 航空制造技术, 2020, 63(16): 14-20. DOI： 10.16080/j.issn1671-833x.2020.16.014.

XU Lei,WU Jie,CUI Xiaoxiao,GUO Ruipeng,YANG Rui. Cracking Analysis of Powder Metallurgy Ti2AlNb Component During Heat Treatment. Aeronautical Manufacturing Technology, 2020, 63(16): 14-20. DOI： 10.16080/j.issn1671-833x.2020.16.014.

摘要

针对 Ti2AlNb 粉末冶金近净成形部件在固溶热处理后开裂的问题进行了分析。结果表明：热等静压过程中包套发生微泄漏，炉腔中高温高压氩气进入包套内部，形成微孔隙类缺陷；这些孔隙在热处理的过程中会发生膨胀形成热诱导孔洞，使部件受到拉应力形成严重的应力集中成为裂纹源，而Ti2AlNb合金属于脆性材料对缺口敏感，一旦裂纹形成会迅速扩展造成部件开裂。

Abstract

One cracking Ti2AlNb powder metallurgy near net shape forming component after solution heat treatment is analyzed in this paper. Slight capsule gas leakage during hot isostatic pressing (HIPing) has been investigated

the results show that the high-temperature and high-pressure argon during the hot isostatic pressing is introduced into the capsule. Argon will not be dissolved or be absorbed within titanium alloy and the argon existed in the form of uncombined element in titanium alloys causing pore defects which are harmful for the mechanical properties of the material. These pores are expanded to form temperature induced pores (TIP pores) during heat treatment

and this usually results in damage to the mechanical properties of the material

which may also cause cracking of the material. Ti2AlNb alloys belong to brittle materials

which are sensitive to notches. Once cracks are formed

they propagate rapidly and then cause cracking.

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