Mechanical properties and rolling behaviors of nano-grained copper with embedded nano-twin bundles
Mechanical properties and rolling behaviors of nano-grained copper with embedded nano-twin bundles
复制标题
嵌入纳米孪晶束的纳米晶铜的力学性能和轧制行为
DOI：
10.1016/j.actamat.2008.01.030
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发表时间：
2008-06
期刊：
影响因子：
9.4
通讯作者：
Zhang, Y.
中科院分区：
文献类型：
--
作者：
Lu, K.;Tao, N. R.;Zhang, Y.
采用液氮温度(LNT)动态塑性变形(DPD)方法，制备了嵌入纳米孪晶束的块体纳米晶铜样品。随后的冷轧(CR)导致纳米孪晶数量减少，晶界能从0.34降至0.22Jm−2，同时晶界能从0.34降至0.22Jm∼2。随着冷轧应变的增加，晶界达到饱和尺寸为110 nm，不到严重变形粗晶的一半。在LNT-DPD样品中，CR导致强度降低，延性提高。LNT-DPD铜在CR过程中的饱和屈服强度比常规严重变形铜的饱和屈服强度高出∼105 Mpa，这源于LNT-DPD样品中的细晶和纳米级孪晶。延性的提高主要归因于CR引起的GB松弛。
By means of dynamic plastic deformation (DPD) at liquid nitrogen temperature (LNT), bulk nano-grained copper samples with embedded nano-twin bundles were prepared. Subsequent cold rolling (CR) of the LNT-DPD Cu led to a reduction in quantity of nano-twin bundles and a slight grain coarsening, accompanied by a decrease in grain boundary (GB) energy from 0.34 to 0.22Jm−2. An increasing CR strain leads to a saturation grain size of ∼110nm, which is less than half of that in the severely deformed Cu from the coarse-grained form. Decreased strength and enhanced ductility were induced by CR in the LNT-DPD sample. The saturation yield strength in the LNT-DPD Cu during CR was ∼105MPa higher than that in conventional severely deformed Cu, which originates from the finer grains as well as the nano-scale twins in the LNT-DPD sample. The enhanced ductility is primarily attributed to CR induced GB relaxation.
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影响因子：
9.4
作者：
Haslam, AJ;Moldovan, D;Gleiter, H
通讯作者：
Gleiter, H
影响因子：
6
作者：
Shen, YF;Lu, L;Lu, K
通讯作者：
Lu, K
影响因子：
2.7
作者：
Valiev, RZ;Alexandrov, IV;Lowe, TC
通讯作者：
Lowe, TC
DOI：
10.1016/0965-9773(92)90074-8
发表时间：
1992-03
期刊：
Nanostructured Materials
影响因子：
--
作者：
G. Nieman;J. Weertman;R. W. Siegel
通讯作者：
G. Nieman;J. Weertman;R. W. Siegel
DOI：
--
发表时间：
1997-02
期刊：
--
影响因子：
--
作者：
J. Howe
通讯作者：
J. Howe