孪生变形

α钛的孪生变形及其塑性韧性的研究

Twinning Deformation and Plasticity and Toughness of α - Titanium Alloys

通过对孪生变形特点及马氏体相变特点进行分析、比较，首次提出了孪生诱发塑性这一概念，用来解释工业纯钛-196℃下较高的拉伸性能。

By comparing the feature of twinning deformation and martensite transformation , the " twinning induced plasticity " was put forward to explain the tensile property in - 196 ℃ .

硬质合金中WC相的孪生变形机制

The Mechanism of Deformation Twin in WC Phase of Cemented Carbide

通过对硬质合金试样施加一定应力，使之产生应变，对其微观组织进行TEM分析，研究了孪生变形特性。

The microstructure and twin deformation properties of WC phases were investigated by loading alloy specimen .

添加锰对TiAl金属间化合物孪生变形的影响

Effects of mn-addition on twinning deformation in TiAl Intermetallics

近以钦合金的室温变形主要由位错滑移控制，20K下的变形则由位错滑移和孪生变形共同控制。

The deformation of near a titanium alloy at RT is controlled by dislocation slip while at 20K is under the mutual control of dislocation slip and twinning .

综述了密排六方金属可能的滑移和孪生变形方式。

The possible slipping and twinning modes in hop metals are summarized .

在高温塑性区塑性良好是由于奥氏体晶粒发生大量的孪生变形；

The thermoplasticity in a high temperature plastic zone was good because of the deformation twin formed in austenite grains .

由孪生变形积聚的畸变能和非基滑移的启动导致了动态再结晶的形核与长大。

The distortion energy stored by twinning and the activation of non-basal slip are responsible for the nucleation and growth of dynamic recrystallization ( DRX ) .

随着应变速率的提高，由于孪生变形机制的激活，大晶粒产生孪生变形，使晶界处的应力集中得到缓解，塑性流变过程逐渐稳定。

However , the plastic flow becomes stable gradually , as the strain rate increases , owing to activation of twinning deformation to release the concentration of stress at grains boundaries .

中高锰钢高应变速率增塑效应，主要与孪生变形大量启动有关，其断裂机制由低应变速率的沿晶断裂转化为高应变速率的晶内韧窝韧性断裂。

The plasticity increasing effect induced by high strain rate is related to the startup of twinning deformation and the fracture mechanism changed from intergranular fracture at low strain rate to intragranular dimple at high strain rate .

且挤压温度高时，孪生在协调变形时的主导地位更明显，从而容易使晶粒细化。

When the temperature of extrusion is high , deformation twins have more important in the coordination of dominance .

结果表明，当WC为单一相时，WC相能产生孪生-滑移协调变形，从而使该合金具有较高的韧性。

The results show that when WC phase is pure phase , it can generate twin-slip coordination deformation , thus the alloy exhibits higher toughness .

冷拔过程的塑性变形为孪生和滑移，孪生为主要变形机制；

The dislocation slip and twinning are the modes of plastic deformation during the hard-drawn .