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Effect of Hydrogen Content on Low-Cycle Fatigue Behavior of Zr-Sn-Nb Alloy
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Effect of Hydrogen Content on Low-Cycle Fatigue Behavior of Zr-Sn-Nb Alloy
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NSFC (50571083), National High-Tech Research and Development Projects “863” (2008AA031071)

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    摘要:

    研究氫對NZ2新鋯合金(Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cr)低周疲勞行為的影響規(guī)律，采用4種不同氫含量(未滲氫，200，450，730 mg/g)的板材試樣進(jìn)行室溫和375 ℃下的低周疲勞試驗(yàn)。結(jié)果表明，在375 ℃下，循環(huán)變形時發(fā)現(xiàn)了動態(tài)應(yīng)變時效現(xiàn)象，滲氫及氫含量的變化不會影響動態(tài)應(yīng)變時效的發(fā)生；氫可以提高375 ℃下NZ2合金的低周疲勞壽命并且導(dǎo)致氫致循環(huán)軟化。

    Abstract:

    The effects of absorbed hydrogen on behavior of NZ2 zirconium alloy (Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cr, in wt% designated as NZ2) were investigated. The sheet specimens were hydrided with different hydrogen contents: unhydrided (original hydrogen content), 200, 450 and 730 mg/g H and tested at room temperature and 375 °C, respectively. The results show that dynamic strain ageing (DSA) can be observed during cyclic deformation of NZ2 alloy at 375 °C. Even if the hydriding content is up to 730 mg/g it has no influence on DSA. Hydrogen can improve the fatigue life of NZ2 alloy at 375 °C and cause the cyclic softening.

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周 軍,李中奎,張建軍,田 鋒. Effect of Hydrogen Content on Low-Cycle Fatigue Behavior of Zr-Sn-Nb Alloy[J].稀有金屬材料與工程,2012,41(9):1531~1534.[Zhou Jun, Li Zhongkui, Zhang Jianjun, Tian Feng. Effect of Hydrogen Content on Low-Cycle Fatigue Behavior of Zr-Sn-Nb Alloy[J]. Rare Metal Materials and Engineering,2012,41(9):1531~1534.]
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  • 收稿日期:2012-03-19
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