金属学报  1986, Vol. 22 Issue (6): 52-57

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Ni-Cu-x(x=Si,Cr)合金时效初期调幅组织的TEM研究

江伯鸿;R.Wagner

上海交通大学材料科学及工程系;西德GKSS研究中心

TEM STUDY OF MODULATED STRUCTURE DURING INITIAL TRANSFORMATION IN Ni-Cu-x (x=Si, Cr) ALLOYS

by JIANG Bohong (Shanghai Jiaotong University); W AGNER R. (GKSS-Forschungszentrum; D2054 Geesthacht; FRG)

江伯鸿;R.Wagner. Ni-Cu-x(x=Si,Cr)合金时效初期调幅组织的TEM研究[J]. 金属学报, 1986, 22(6): 52-57.
, . TEM STUDY OF MODULATED STRUCTURE DURING INITIAL TRANSFORMATION IN Ni-Cu-x (x=Si, Cr) ALLOYS[J]. Acta Metall Sin, 1986, 22(6): 52-57.

摘要 参考文献 相关文章 Metrics 全文: PDF(2993 KB)   摘要: <正> 调幅组织(modulated structure)可以通过调幅分解(spinodal Decomposition)而产生,使合金获得成分不同的呈周期规则排列的两相结构;它也可通过形核-长大机制,即在长大(或粗化)过程中由于各向异性的共格应变能的作用,形成有取向的规则排列的两相组织。因此相分解的两种机制:调幅分解和形核-长大,在相变后期都可获得几乎相同的调幅组织,难以区分。 有人认为电子衍射中出现卫星反射(Satellite)(或X衍射中出现边带)和TEM Abstract：The modulated structure developed during early aging stage in Ni-38Cu-6Si and Ni-60Cu-4Cr (by at.-%) alloys have been studied by TEM in different operating conditions It has been shown that the features of wavy striation contrast in image and satellites in diffraction patterns were viewed in both Ni-Cu-Si and Ni-Cu-Cr alloys But the diserete particles distributed randomly with sharp interphase boundaries were detected in initial stages of aging by using the technique of defocussing high order reflection in bright field. However, they arrayed periodically along <100> direction after some aging time. Accordingly it is suggested that the modulated structure formed by aging at 580℃ in the two alloys is not due to spinodal decomposition The distinguishing criterions between spinodal reaction and nucleation-growth have been discussed. 收稿日期: 1986-06-18      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 江伯鸿 R.Wagner 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1986/V22/I6/52 1 Cahn, J.W., J.Chem, Phys., 42 (1965) , 93． 2 Schwartz, L.H.; Manajan, S.; Plewes, J.T., Acta Metall., 22 (1974) , 601． 3 Vijayalakshmi M.; Seetharaman, V.; Reaghunathan, V.S., J. Mater. Sci., 17 (1982) , 126． 4 Ardell, A.J.; Nicholson, R.B., Acta Metall., 14 5 Butler, E.P.; Thomas, G., Acta Metall., 18 (1970) , 347． 6 Laughlin, D.E., Acta Metall., 24 (1976) , 53． 7 Laughlin, D.E.; Cahn, J.W., Acta Metall., 23 (1975) , 329． 8 Guinier, A., Acta Metall., 3 (1955) , 510． 9 辻本得藏;高藤一男,日本金属学会誌,37(1973) ,179． 10 Faulknet, R.G.; Ralph,B., Acta Metall., 20(1972) ,703． 11 Alvensleben, L.V.; Wagner, R., to appear in Acta Scr. Conf, Ser., Special Issue of the Proc. of the Int. Conf. on Early Stage Decomposition, Sonnnberg, FRG, 1983． 12 Thomas, G.; Goringe, M. J., Transmission Electron Microscopy of Materials, Wiley, 1979, p. 310． 13 Daniel V.; Lipson, H., Proc. R. Soc., A181 (1943) , 368． 14 Miyazaki, T.; Murayama, H.; Mori, H., Trans. J. Inst Met., 18 (1977) , 697． 15 Wu, C.K.; Thomas, G., Metall. Trans., 8A (1977) , 1911． 16 Jantzen, C.M.F.; Herman, H., Spinodal Decomposition-Phase Diagram Representation and Occurrence, in "Phase Diagrams, Materials Science and Technology", Refractory Materials, Vol. 6, Academic Press, New York, 1978, p. 127． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed