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高溫水環(huán)境中鎳基合金力學性能對裂尖力學化學效應的影響
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西安科技大學,西安科技大學,西安科技大學,西安科技大學

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國家自然科學基金項目（面上項目，重點項目，重大項目）;國家教育部博士點基金;陜西省教育廳自然科學專項基金


Influence of Nickel-based Alloys Mechanical Properties on Mechanochemical Effect at Crack Tip in High Temperature Water Envir
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Xi’an University of Science & Technology,Xi’an University of Science & Technology,Xi’an University of Science & Technology,Xi’an University of Science & Technology

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    摘要:

    力學與化學相互作用引起的力學化學效應會加速核電站中鎳基合金的應力腐蝕開裂行為。焊接接頭材料力學性能的不均勻性，將間接影響材料的力學化學效應。本文采用標準緊湊拉伸試樣和有限元方法，研究得到了高溫水環(huán)境中600合金屈服強度和硬化指數(shù)對裂紋尖端表面力學化學效應的影響，分析了彈性和塑性變形對裂紋尖端力學化學效應的作用。結果表明600合金裂尖表面的力學化學效應受到屈服強度的變化的影響，但硬化指數(shù)對裂尖表面力學化學效應的影響不明顯。

    Abstract:

    Mechanochemical effect which is the interaction of mechanical and chemical can accelerate the stress corrosion cracking (SCC) in nickel-based used in nuclear power plants. The mechanical properties heterogeneity in weld joints will influence the mechanochemical effect indirectly. The effects of yield strength and hardening exponent of alloy 600 on the mechanochemical effect of crack tip surface in high temperature water environment were studied by adopting one inch compact tension specimen and finite element method. The effects of elastic and plastic deformation on the change of mechanochemical effect were discussed. The results indicate that the mechanochemical effect is affected by the yield strength. In contrary, the hardening exponent change of alloy 600 has insignificantly influence on mechanochemical effect.

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楊富強,薛河,趙凌燕,方秀榮.高溫水環(huán)境中鎳基合金力學性能對裂尖力學化學效應的影響[J].稀有金屬材料與工程,2016,45(7):1641~1646.[Yang FuQiang, Xue He, Zhao Lingyan, Fang Xiurong. Influence of Nickel-based Alloys Mechanical Properties on Mechanochemical Effect at Crack Tip in High Temperature Water Envir[J]. Rare Metal Materials and Engineering,2016,45(7):1641~1646.]
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  • 收稿日期:2014-05-16
  • 最后修改日期:2014-11-06
  • 錄用日期:2014-11-20
  • 在線發(fā)布日期: 2016-10-09
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