| 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,1988(4). |
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| 作者姓名： | 潘峰 张少卿 薛志庠 |
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| 作者单位： | 北京肮空材料研究所，北京肮空材料研究所，北京肮空材料研究所 |
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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 |
The 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.The Influence of Hydrogen Treatment on the Low Cycle Fatigue Life and Fracture Toughness of a Cast Titanium Alloy[J].Materials Science and Technology,1988(4). |
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| Authors: | Pan Feng Zhang Shaoqing Xue Zhixiang |
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| Affiliation: | Institute of Aeronatical Materials |
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| Abstract: | This paper presents the results of an investigation of the influence of hydrogen treatment on the low cycle fatigue life and fracture toughness of Ti-6Al-4V cast alloy. The coarse Widmanstatten microstructure of the cast titanium alloy was broken up into a very fine equiaxed microstructure after hydrogen treatment. The strain LCF life of the cast alloy refined by hydrogen treatme-nt was greatly increased. The results of LCF tests showed that the cyclic hardening is associated with the low strain amplitudes and the cyclic softe-ning with the high strain amplitudes. After hydrogen treatment the brittle fracture morphology of specimen as cast is transformed into ductile one, and the fracture toughness improved. |
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| Keywords: | hydrogen treatment Cast titanium alloy fatigue life fracture toughness |
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