Influence of stacking fault energy on nanostructure formation under high pressure torsion
Influence of stacking fault energy on nanostructure formation under high pressure torsion
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DOI：
10.1016/j.msea.2005.08.074
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发表时间：
2005-11
期刊：
影响因子：
6.4
通讯作者：
Yonghao Zhao;X. Liao;Yuntian Zhu;Z. Horita;T. Langdon
中科院分区：
文献类型：
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作者：
Yonghao Zhao;X. Liao;Yuntian Zhu;Z. Horita;T. Langdon
铜、青铜 (Cu–10wt.% Zn) 和黄铜 (Cu–30wt.% Zn) 在 6GPa 的压力下通过高压扭转 (HPT) 变形五次旋转。铜、青铜和黄铜的堆垛层错能（SFE）分别为78、35和14mJ/m2，HPT处理后的平均晶粒尺寸分别约为84、54和17nm。所有样品中均发现变形孪晶，其密度随着 SFE 的降低而增加。这项工作表明，在相同的 HPT 条件下，低 SFE 促进纳米结构和形变孪晶的形成。
Copper, bronze (Cu–10wt.% Zn) and brass (Cu–30wt.% Zn) were deformed by high pressure torsion (HPT) under a pressure of 6GPa for five rotations. The stacking fault energies (SFEs) of copper, bronze and brass are 78, 35 and 14mJ/m2, respectively, and their average grain sizes after the HPT processing were about 84, 54 and 17nm, respectively. Deformation twins were found in all samples and their densities increased with decreasing SFE. This work demonstrates that under the same conditions of HPT a low SFE promotes the formation of nanostructures and deformation twins.