金属学报  1987, Vol. 23 Issue (4): 313-320

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镁合金超塑性变形的复合机制

陈浦泉;赵敏

哈尔滨工业大学;哈尔滨工业大学

A COMPLEX DEFORMATION MECHANISM FOR SUPERPLASTIC DEFORMATION OF Mg ALLOY

by CHEN Puquan; ZHAO Min (Harbin Institute of Technology) (Manuscript received 10 May; 1985; revised manuscript 15 February; 1986)

陈浦泉;赵敏. 镁合金超塑性变形的复合机制[J]. 金属学报, 1987, 23(4): 313-320.
, . A COMPLEX DEFORMATION MECHANISM FOR SUPERPLASTIC DEFORMATION OF Mg ALLOY[J]. Acta Metall Sin, 1987, 23(4): 313-320.

摘要 参考文献 相关文章 Metrics 全文: PDF(1404 KB)   摘要: 本文选用大晶粒和微细晶粒两种镁合金,利用现代测试手段进行超塑性变形机制的研究.结果表明,在超塑性变形条件下,两种合金都显示以晶界滑动为主的,由扩散蠕变和位错滑移所协调的复合变形机制.作者提出一个包括三种变形机制在内的复合机制模型.在超塑性变形中,下层金属晶粒通过晶界滑动不断涌现到试样表面横向晶界发生宽化及空洞的地方,从而不断增加沿拉伸轴方向上的晶粒数.这是试样在拉伸变形中获得非常大的伸长量的原因. Abstract：Study was made of the superplastic deformation mechanism for two selected Mg alloys of either coarse or superfine grain by means of an advanced testing technique. It was shown that the mechanism under superplastic deformation for these two alloys is mainly due to the grain boundary sliding together with the coordination of diffusion creep and dislocation slip. A complex deformation mechanism model including the above mentioned three ones is believed to be proposed. The metal grains may progressively emerge from underneath up to surface during superplastic deformation through grain boundary sliding in the site on which the broadening and cavities along transverse grain boundaries appeared, thus, the number of grains along the tensile axis may be continuously incressed. This seems to be the origin of the extreme elongation of the specimen under tensile deformation. 收稿日期: 1987-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 陈浦泉 赵敏 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I4/313 1 Ashby M F, Verall R A, Acta Metall, 1973; 21: 149 2 Novikov I I. Acta Metall, 1977; 10: 1139 3 Ball A, Hutchison M M. Met Sci J, 1969; 3: 1 4 Mukherjee A K. Mat Sci Eng, 1971; 8: 83 5 Spingarn J R, Nix W D. Acta Metall, 1979; 27: 171 6 Gifkins R C. Metall Trans. 1976; 17: 1225 7 Gifkins R C. J Mater Sci, 1978: 13: 1926 8 Geckinli A E. Met Sci, 1983; 17: 12 9 杨金风,陈浦泉.宇航学报,1984;1:44 10 陈浦泉,赵敏.金属热处理,1984;(9) :23 11 陈浦泉,赵敏.金属科学与工艺,1985;4(1) :33 12 Chen Puquan(陈浦泉), Zhao Min(赵敏). In: Pro 7th Int Conf on the Strength of Metals and Alloys, New York: Pergamon Press, 1985; 2: 817g No related articles found! Viewed Full text Abstract Cited   Shared      Discussed