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EFFECT OF AGING ON HYDROGEN EMBRITTLEMENT SUSCEPTIBILITY OF STEEL Cr21Ni6Mn9N |
LIU Jianchao;GUO Yunyi (Y. Y. KUO);XING Zhongshu;SHI Changxu (C. H. SHIH);LIANG Wubiao Institute of Metal Research; Academia Sinica; Shenyang; No.2 Automobile Factory; Shiyan |
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Cite this article:
LIU Jianchao;GUO Yunyi (Y. Y. KUO);XING Zhongshu;SHI Changxu (C. H. SHIH);LIANG Wubiao Institute of Metal Research; Academia Sinica; Shenyang; No.2 Automobile Factory; Shiyan. EFFECT OF AGING ON HYDROGEN EMBRITTLEMENT SUSCEPTIBILITY OF STEEL Cr21Ni6Mn9N. Acta Metall Sin, 1988, 24(6): 386-391.
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Abstract Effects of 650℃ aging for 1-1000h on structure and hydrogenembrittlement susceptibility (HES) of steel Cr21Ni6Mn9N have been investigated.The results show that M_(23)C_6 type carbide precipitates at grain boundaries and Cr-depletive region creates beside them during aging. The precipitates grow and connecteach other as the aging time prolongs, meanwhile, the degree of Cr-depletion aggra-vates first and then recovers gradually while the aging time is very long, i. e.,1000h. The HES of the steel increases with increasing aging time but dose notreduce with the recover of Cr content at the Cr-depletive region. That implies theexisting of carbides at grain boundaries might be the main reason which promotesthe HES of steel during aging.
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Received: 18 June 1988
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1 Tien J K, Thompson A W, Bernstein I M, Richards R J. Metall Trans, 1976; 7A: 821 2 Thompson A W, Brooks J A. Metall Trans, 1985; 6A: 1431 3 Thompson A W. Mater Sci Eng, 1974; 14: 253 4 Pressouyre G M. Bernstein I M. Metall Trans, 1981; 12A: 835 5 Pressouyre G M. Acta Metall, 1980; 28: 895 6 Braint C L. In: Bernstein I M, Thompson A W eds., Hydrogen Effects in Metals, New York: AIME, 1981: 527 7 Braint C L. Metall Trans, 1978; 9A: 731 8 刘建潮,郭蕴宜,邢中枢,师昌绪.金属学报,1988;24(3) :A173 |
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