金属学报  1986, Vol. 22 Issue (3): 43-152

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氢对纯Nb形变与断裂微观过程影响的研究

陈廉;刘民治;苏会和

中国科学院金属研究所;中国科学院金属研究所;中国科学院金属研究所

IN SITU STUDY OF EFFECT OF HYDROGEN ON DEFORMATION AND FRACTURE BEHAVIOUR IN Nb

by CHEN Lian; LIU Minzhi; SU Huihe (Institute of Metal Research; Academia Sinica; Shenyang)

陈廉;刘民治;苏会和. 氢对纯Nb形变与断裂微观过程影响的研究[J]. 金属学报, 1986, 22(3): 43-152.
, , . IN SITU STUDY OF EFFECT OF HYDROGEN ON DEFORMATION AND FRACTURE BEHAVIOUR IN Nb[J]. Acta Metall Sin, 1986, 22(3): 43-152.

摘要 参考文献 相关文章 Metrics 全文: PDF(3793 KB)   摘要: 本文用带有拉伸装置的扫描电镜和金相显微镜,研究了纯Nb在室温电解充氢后形变和断裂的动态微观行为。结果表明,Nb的氢化物都在{100}晶面析出,较多的正交针状氢化物能构成魏氏组织。固溶氢的α基体在拉伸变形时,有明显的滑移线和晶界凸起,裂纹萌生在形变带或晶界处。含氢化物的基体在拉伸时表现出完全的脆性,呈穿晶解理断裂。解理面上有各种脆性断裂特征的花样和两种氢化物,裂纹多从氢化物处萌生。 Abstract：SEM and optical microscope in situ examinations under tensile loading were performed on the effect of hydrogen upon the microprocess of deformation and fracture behaviour in cathodic charged pure Nb. The Nb hydrides are found to precipitate on the {100} plane of matrix. Most dendritic hydrides in orthorhombic needleshape are of the Widmanstatten structure. The slip lines and grain boundary hunches are obviously observed in the α-solid solution matrix with hydrogen dissolved under tensile deformation. The microcracks initiated themself along the slip lines predominately and the deformation bands as well as the grain boundary oriented normal to the stress axis. The main crack propagation is the coalescence of micro-craks in the vicinity of the crack tip and through the transgranular path. The α-solid solution matrix with β-hydride is extremely brittle and of transgranular cleavage fracture under tension. The micro-patterns featuring all brittle fractures and two β-hydrides are appeared on the cleavage facets. The mierocrack growth are presented at the hydride/matrix interface. The crystal orientation of hydrogen embrittlement cleavage facets in pure Nb, the stress induced β-hydride and two typical hydrogen embrittlement mechanisms of pure Nb have been also discussed. 收稿日期: 1986-03-18      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 陈廉 刘民治 苏会和 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1986/V22/I3/43 1 陈廉;刘民治;苏会和;尹万全;李翠屏,金属学报,17 (1981) ,541． 2 Schober, T.; Wenzl, H., Hydrogen in Metal, Ⅱ, Eds. Alefeld, G.; Voelkl, J., Springer-Verlag, Berlin, 1978, p. 32． 3 Alefeld, G.; Peisl, H.; Langeler, B.; Venzl, H.; Soringer, T.; Voelkl, J.; Wipf, H.; Wanger, H., Seminar on Hydrogen in Metals, Shenyang, Peoples Republic of China, 1981． 4 Birnbaum, H.K., Atomistics of Fracture, Eds. Latanision, R.M.; Pickens, J.R., 1983, p. 733-769． 5 Gahr, S.; Grossbeck, M.L.; Birnbaum, H.K., Acta Metall., 25 (1977) , 125． 6 Grossbeck, M.L.; Birnbaum, H.K., Acta Metall., 25 (1977) , 137． 7 Gahr, S.; Birnbaum, H.K., Acta Metall., 26 (1978) , 1781． 8 Gahr, S.; Birnbaum, H.K., Acta Metall., 16 (1978) , 1207． 9 Birnbaum, H.K.; Grossbeck, M.L.; Amano, M., J. Less-Common Met., 49 (1976) , 357． 10 Birnbaum, H.K.; Gahr, S., Hydrogen in Metals, Eds. Bernstein, I.M.; Thompson, A.W., ASM, 1974, p. 303． 11 Farahami, M.M.; Attia, F.; Salama, K., Metall Trans., 12A (1981) , 631． 12 Churchman. A.T., J. Inst. Met., 88 (1959/60) , 221． 13 Sagues, A.A.; Ulitchng, M.G.; Gibala, R., Effect of Hydrogen on the Behavior of Materials, Eds. Thompson, A.W.; Bernstein, I.M., TMS-AIME, New York, 1976, p. 309． 14 Hardie, D.; McIntyre, P., Metall Trans., 4 (1973) , 1247． 15 Amano, M.; Sasaki, Y., Phys. Status Solidi, (a), 19 (1973) , 405． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed