Room-temperature ductile carbides
Room-temperature ductile carbides
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DOI：
10.1007/s11661-999-0325-0
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发表时间：
1999-02-01
影响因子：
2.8
通讯作者：
El-Raghy, T
中科院分区：
文献类型：
--
作者：
Barsoum, MW;El-Raghy, T
大晶粒、取向、多晶的Ti3SiC2试样在室温压缩下发生塑性变形。当基面以允许滑动的方式定向时，通过剪切带的形成发生变形。室温下的最小临界分解剪应力约为36mpa。当滑动面与施加的载荷平行时——在这种情况下，普通的滑动是不可能发生的——变形由单个颗粒的分层和扭结带形成的组合以及剪切带形成而发生。正是这种独特的变形模式的多样性，使得材料可以在任意方向上进行塑性变形。
Large-grained, oriented, polycrystalline samples of Ti3SiC2 loaded in compression at room temperature deform plastically. When the basal planes are oriented in such a way that allows for slip, deformation occurs by the formation of shear bands. The minimum critical resolved shear stress at room temperature is approximate to 36 MPa. When the slip planes are parallel to the applied load-a situation where ordinary glide is impossible-deformation occurs by a combination of delamination of, and kink band formation in, individual grains, as well as by shear band formation. It is this unique multiplicity of deformation modes that allows the material to deform plastically in any arbitrary orientation.