| 氢处理对铸造钛合金低周疲劳寿命及断裂韧性的影响 |
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| 引用本文： | 潘峰,张少卿,薛志庠.氢处理对铸造钛合金低周疲劳寿命及断裂韧性的影响[J].材料科学与工艺,1990(1). |
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| 作者姓名： | 潘峰 张少卿 薛志庠 |
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| 作者单位： | 北京航空材料研究所，北京航空材料研究所，北京航空材料研究所 |
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| 摘 要： | 本文研究了氢处理对铸造钛合金的低周疲劳寿命及断裂韧性的影响,发现经氢处理后铸造钛合金粗大的魏氏组织转变成细小的等轴组织,其应变低周疲劳寿命大大延长,在低周疲劳过程中,应变量较小时,试样出现循环硬化现象,而在应变量较大时,出现循环软化现象,氢处理后材料的断裂形式由脆性断裂转为韧性断裂;断裂韧性提高。
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| 关 键 词： | 氢处理 铸造钛合金 疲劳寿命 断裂韧性 |
Influence of Hydrogen Treatment on the Low Cycle Fatigue Life and Fracture Toughness of a Cast Titanium Alloy |
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| Pan Feng Zhang Shaoqing Xue Zhixiang.Influence of Hydrogen Treatment on the Low Cycle Fatigue Life and Fracture Toughness of a Cast Titanium Alloy[J].Materials Science and Technology,1990(1). |
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| Authors: | Pan Feng Zhang Shaoqing Xue Zhixiang |
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| Affiliation: | Beijing Institute of Aeronautical Materials |
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| Abstract: | This paper prcsents the results of an investigation of the influence of hydrogen treatment on the low cycle fatigue life and fracture toughness of Ti-6AI-4V cast alloy The coarse widmanstatten micrcstructure of the cast titanium alloy was bro- ken up into a very fine equiaxed microstrueture after hydrogen treatment.The strain LCF life of the cast alloy refined by hydrogen treatment was greatly increased.The results of LCF test showed that the cyclic hardening is assoc- iated with the low strain amplitudes and the cyclic softening with the high strain amplitudes.After hydrogen treatment the brittle fracture morphology of specimen as cast transformed into ductile one,and the fracture toughness is improved. |
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| Keywords: | hydrogen treatment cast titanium alloy fatigue life fracture toughness |
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