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| 氢对Ti-2Al-2.5Zr钛合金疲劳性能的影响 | |
| 引用本文： | 何晓,沈保罗,岳俊,曹建玲,邱绍宇,邹红.氢对Ti-2Al-2.5Zr钛合金疲劳性能的影响[J].金属热处理,2002,27(12):10-13. |
| 作者姓名： | 何晓 沈保罗 岳俊 曹建玲 邱绍宇 邹红 |
| 作者单位： | 1. 四川大学,金属材料系,成都,610061;成都飞机工业,集团,公司冶金处,成都,610092 2. 四川大学,金属材料系,成都,610061 3. 成都飞机工业,集团,公司冶金处,成都,610092 4. 中国核动力研究设计院,国家重点试验室,成都,610041 |
| 摘 要： | 研究了4种含量的氢对Ti-2Al-2.5Zr钛合金疲劳性能的影响。结果表明，自然含氢量的材料具有最好的疲劳性能。而当疲劳载荷大于材料的屈服强度时，氢含量对疲劳寿命基本没有影响；低于屈服强度后，疲劳寿命随着氢含量的升高而和。认为固溶的原子氢导致驻留滑移带软化，裂纹萌生提前，造成在较大△σ时充氢试样的疲劳寿命降低；而材料中氢化物对驻留滑移带（PSB）的阻碍作用导致氢化物与基体分离 而成为裂纹源，是小△σ下疲劳寿命降低扩要原因。 |
| 关 键 词： | 钛合金 疲劳断裂 氢 氢化物 |
| 文章编号： | 0254-6051(2002)12-0010-04 |
Effects of Hydrogen on Fatigue Property for Ti-2Al-2.5Zr Titanium Alloy |
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| HE Xiao ,SHEN Bao luo ,YUE Jun ,CAO Jian ling ,QIU Shao yu ,ZOU Hong.Effects of Hydrogen on Fatigue Property for Ti-2Al-2.5Zr Titanium Alloy[J].Heat Treatment of Metals,2002,27(12):10-13. | |
| Authors: | HE Xiao SHEN Bao luo YUE Jun CAO Jian ling QIU Shao yu ZOU Hong |
| Affiliation: | HE Xiao 1,2,SHEN Bao luo 1,YUE Jun 2,CAO Jian ling 1,QIU Shao yu 3,ZOU Hong 3 |
| Abstract: | Four kinds hydrogen contents have been employed to investigate the effects of hydrogen on fatigue property of Ti 2Al 2 5Zr titanium alloy.The results show that the hydrogen has little effect on fatigue life when fatigue load is higher than yield strength.Fatigue lives of samples decrease with the increase of hydrogen content when fatigue load is lower than yield strength.Explanation for the decrease of fatigue lives is that interstitial hydrogen atoms soften the Persistent Slip Bands(PSB),and hydrides bolck the PSBs,as a result,cracks initiate in advance. |
| Keywords: | titanium alloy fatigue fracture hydrogen hydride |
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