| 含稀土相高温钛合金焊接接头的疲劳断裂特性 |
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| 引用本文： | 李晋炜,左从进,陈志勇,王清江.含稀土相高温钛合金焊接接头的疲劳断裂特性[J].稀有金属材料与工程,2009,38(Z3). |
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| 作者姓名： | 李晋炜 左从进 陈志勇 王清江 |
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| 作者单位： | 1. 北京航空制造工程研究所,高能束流加工技术重点实验室,北京,100024
2. 中国科学院金属研究所,辽宁,沈阳,110015 |
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| 摘 要： | 研究了Ti-60合金电子束焊接接头的显微组织及稀土相的分布特征;对焊接接头高温旋转弯曲疲劳性能进行了试验研究,讨论了影响接头疲劳性能的主要因素.焊后状态下焊缝区中存在大量的α′马氏体组织,焊缝区中的稀土相颗粒弥散分布于晶界及晶内,尺寸在100～200 nm.焊接接头具有较好的高温旋转弯曲疲劳性能,无焊接缺陷的接头均断裂在母材区,稀土相颗粒对裂纹的扩展具有阻碍作用.
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| 关 键 词： | 高温钛合金 焊接接头 稀土相 疲劳断裂 |
Fatigue Fracture Property of Welding Joints of High Temperature Titanium Alloy with Rare Earth Phase |
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| Li Jinwei,Zuo Congjin,Chen Zhiyong,Wang Qingjiang.Fatigue Fracture Property of Welding Joints of High Temperature Titanium Alloy with Rare Earth Phase[J].Rare Metal Materials and Engineering,2009,38(Z3). |
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| Authors: | Li Jinwei Zuo Congjin Chen Zhiyong Wang Qingjiang |
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| Affiliation: | Li Jinwei1,Zuo Congjin 1,Chen Zhiyong 2,Wang Qingjiang 2 (1. Key Laboratory of High Energy Density Beam Processing Technology,Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China) (2. Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China) |
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| Abstract: | The microstructure of EBW joints (Electron Beam Welding) of Ti-60 alloy and its rare earth phase distribution were investigated. High-temperature rotation flexible fatigue properties of the welding joints were tested and the main influencing factors were also discussed, There is a lot of α′ martensitil microstructure in the fusion zone at the post-welding state. And the rare earth particles of 100～200 nm dispersively distributed in the boundaries and grains. The obtained welding joints have better high-temperature rotation flexible fatigue properties. The joints without welding defects are all in parent metal. Rare earth phase particles can hinder the crack propagation. |
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| Keywords: | high temperature titanium alloy welding joint rare earth phase fatigue fracture |
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