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充氚不銹鋼焊縫微觀組織
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中國工程物理研究院科學(xué)技術(shù)發(fā)展基金資助（2008A03010）


Microstructure of Stainless Steel Welding after Tritium Charging
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    摘要:

    用電子顯微鏡研究了不銹鋼電子束、激光束焊縫試樣在高溫氣相充氫氚后斷裂的微觀行為及顯微組織，并用材料試驗機測試了其斷裂強度。結(jié)果表明：不銹鋼焊縫試樣充氫氚后斷裂強度值略有下降，斷口組織中出現(xiàn)了明顯的氫脆斷裂特征:氫脆撕裂嶺、準解理斷裂形態(tài)、沿晶斷裂形態(tài)和氫致二次裂紋。TEM研究表明，氣態(tài)氚有與晶界初生析出物交互作用形成氚蝕裂紋趨勢；裂紋萌生在形變帶和晶界處。

    Abstract:

    The microstructure and fracture behavior of electron beam and laser beam welded stainless steel samples after charging hydrogen and tritium were studied by electron microscopy and the fracture strength was measured by tensile test. The results show that the fracture strength of the welding charged with tritium decreases a little, and the morphology of fracture surface has the typical hydrogen embrittlement mechanisms such as cleavage fracture, the second cracks and intergranular fracture. TEM observation indicates that there is a tendency to form cracks caused by the interaction between gas tritium and precipitates in grain boundary, and the microcracks initiate along deformation bands and grain boundary.

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任大鵬,羅德禮,李 嶸,蔚勇軍,郎定木,邱志聰,姜桂芬.充氚不銹鋼焊縫微觀組織[J].稀有金屬材料與工程,2011,40(12):2203~2206.[Ren Dapeng, Luo Deli, Li Rong, Wei Yongjun, Lang Dingmu, Qiu Zhicong, Jiang Guifen. Microstructure of Stainless Steel Welding after Tritium Charging[J]. Rare Metal Materials and Engineering,2011,40(12):2203~2206.]
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  • 收稿日期:2010-12-18
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