董宇,刘茂林,张宁,王新丽

• 1:东北大学分析测试中心
• 2:东北大学材料科学与工程学院
• 3:东北大学材料各向异性教育部重点实验室

摘要(Abstract)：

在退火后的纯铜和H62黄铜样品拉伸过程中施加不同强度的脉冲电流,借助透射电镜观察了不同条件下纯铜和黄铜微观结构的演变。结果表明:层错能较高的纯铜变形过程中主要是位错组态的演变主导,且电流处理后塑性降低;而层错能较低的H62黄铜变形过程主要是孪生主导,电流处理后塑性显著提高。因此,材料本征特性层错能影响着电致塑性效应。

关键词(KeyWords)： 层错能;脉冲电流;铜及铜合金;电致塑性效应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51471047)

作者(Author): 董宇,刘茂林,张宁,王新丽

DOI: 10.13289/j.issn.1009-6264.2019-0314

参考文献(References)：

• [1] Troitskii O A,Likhtman V I.Anisotropy of action of gamma-electronic emission and gamma rays on deformation of single zinc crystals in the brittle state[J].Doklady Akademii Nauk Sssr,1963,148(2):332-334.
• [2] Troitskii O A,Stashenko V I.Stress relaxation investigation of the electroplastic deformation of a metal[J].Fizika Metallov i Metallovedenie,1979,47(1):180-187.
• [3] Troitskii O A.The effect of an electric current on the relaxation of stresses in crystals of Zn,Cd and Pb crystals[J].Physica Status Solidi A,1977,13(1):46-49.
• [4] Cao W D,Sprecher A F,Conrad H.Measurement of the electroplastic effect in Nb[J].Scripta Metallurgica,1989,22(12):1026-1034.
• [5] Conrad H.Effects of electric current on solid state phase transformations in metals[J].Materials Science and Engineering A,2000,287(2):227-237.
• [6] Conrad H.Thermally activated plastic flow of metals and ceramics with an electric field or current[J].Materials Science and Engineering A,2002,322(1):100-107.
• [7] Molotskii M,Fleurov V.Magnetic effects in electroplasticity of metals[J].Physical Review B,1995,52(22):15829-15834.
• [8] Tang G Y,Zhang J,Zheng M X,et al.Experimental study of electroplastic effect on stainless steel wire 304L[J].Materials Science and Engineering A,2000,281(1):263-267.
• [9] Xu Z H,Tang G Y,Tian S Q,et al.Research of electroplastic rolling of AZ31 Mg alloy strip[J].Journal of Materials Processing Technology,2007,182(1):128-133.
• [10] Tang G Y,Zhang J,Yan Y J,et al.The engineering application of the electroplastic effect in the cold-drawing of stainless steel wire[J].Journal of Materials Processing Technology,2003,137(1):96-99.
• [11] Jiang Y B,Tang G Y,Shek C H,et al.Mechanism of electropulsing induced recrystallization in a cold-rolled Mg-9Al-1Zn alloy[J].Journal of Alloys and Compounds,2012,536:94-105.
• [12] Liu M S,Wang X L,Zhao X.Effect of high-density electric current pulses on precipitation and mechanical properties of a Cu-Zn alloy[J].Materials Science and Technology,2017,33(12):1411-1416.
• [13] Iwahashi Y,Horita Z,Nemoto M,et al.An investigation of microstructural evolution during equal-channel angular pressing[J].Acta Materialia,1997,45(11):4733-4741.
• [14] Iwahashi Y,Horita Z,Nemoto M,et al.The process of grain refinement in equal-channel angular pressing[J].Acta Materialia,1998,46(9):3317-3331.
• [15] Tao N R,Lu K.Nanoscale structural refinement via deformation twinning in face-centered cubic metals[J].Scripta Materialia,2009,60(12):1039-1043.
• [16] Khaled Y,Miroslara S,Hamed B,et al.Effect of stacking fault energy on mechanical behavior of bulk nanocrystalline Cu and Cu alloys[J].Acta Materialia,2011,59(14):5758-5764.

文章评论(Comment)：