金属学报  1984, Vol. 20 Issue (3): 176-181

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Ni-Ti合金超弹性及其相变过程的扫描电镜动态研究

金嘉陵

上海钢铁研究所

SUPERELASTICITY OF Ni-Ti ALLOY AND IN SITU OBSERVATION OF ITS PHASE TRANSITION BY SEM

JIN Jialing (Shanghai Institute of Iron and Steel Research) (Manuscript received 3 January; 1983; revised manuscript 30 July; 1983)

金嘉陵. Ni-Ti合金超弹性及其相变过程的扫描电镜动态研究[J]. 金属学报, 1984, 20(3): 176-181.
. SUPERELASTICITY OF Ni-Ti ALLOY AND IN SITU OBSERVATION OF ITS PHASE TRANSITION BY SEM[J]. Acta Metall Sin, 1984, 20(3): 176-181.

摘要 参考文献 相关文章 Metrics 全文: PDF(1500 KB)   摘要: 本工作采用一种特殊的热处理工艺,可使51.6 at.-％Ni-Ti合金表现出超弹性行为,其极限弹性应变值为17％。在扫描电镜拉伸样品台上观察了该合金的应变诱发相变:预马氏体转变和马氏体转变。只要应变不超出弹性极限值,在任一点卸载,整个过程将逆向进行,宏观、微观特征完全恢复为原状,表明材料具有超弹性行为。如果应变超出极限值,则会导致晶间裂纹和晶内滑移,带来不可逆的残余应变。 Abstract：An in situ observation by SEM was made of the phase transition induced by stain in the specially heat treated 51.6 at.-%Ni-Ti ahoy of which the superelasticity might be reached to such extent of its maximum elastic strain up to 17%. The phase transition is shown as two stages, namely, pre-martensitic and martensitic. The alloy reveals a behaviour for superelasticity, i. e., if the strain exceeds no more than its elastic limit, the whole transition process may be reversible, and the macro-or micro-feature may be back to beginning after unloading at any point of the curve. However, the intergranular cracks and the internal slips may be appeared, as well as the unreversible residual strain may be then remained if it exceeded the limit. 收稿日期: 1984-03-18      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 金嘉陵 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1984/V20/I3/176 1 徐永波;李恒武;苏会和;朱桂秋,金属学报,15(1979) ,369． 2 Wayman, C.M., Proc. of 1st JIM Int. Symp. on New Aspects of Martensitic Transformation, Ed. Suzuki, H. et al., Sendal, JIM, 1976, p.159． 3 Ling, H.C.; Kaplow, R., Metall. Trans., 11A (1980) , 77． 4 Nakanishi, N., Prog. Mater. Sci., 24 (1979) , №3/4, 143． 5 Warlimont, H.; Delaey, L.; Krishnan, R.V.; Tas, H., J. Mater. Sci.; 9 (1974) , 1545． 6 Krishnan, R.V.; Delaey, L.; Tas, H.; Warlimont, H., J. Mater. Sci., 9 (1974) , 1536．S No related articles found! Viewed Full text Abstract Cited   Shared      Discussed