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认为试样表面的变形场出现不连续性不是绝热剪切带出现的标志,而是形变绝热剪切带进一步发展的结果;在计算绝热剪切带内部的峰值温度时应从局部剪切应变中扣除弹性应变,因为弹性应变不会对塑性功有所贡献。以动态扭转的Ti-6Al-4V试样(TA-50)为例,计算了绝热剪切带内部的峰值温度,其被划分为3部分:环境温度、均匀和非均匀变形引起的温度。在两种条件下(从局部剪切应变中扣除弹性应变与否),计算出的峰值温度分别为669和665℃,其在热回复和再结晶的温度范围之内,未达到相变的温度,比Liao及Duffy的理论计算值(630℃)要高。如果剪切应力-局部塑性剪切应变的关系不能完全确定,适当的近似是必要的。
It is considered that the discontinuity of the deformation field on the specimen surface is not a sign of adiabatic shear band but a result of the further development of the deformation adiabatic shear band and should be deducted from the local shear strain when calculating the peak temperature inside the adiabatic shear band Elastic strain, because the elastic strain will not contribute to the plastic work. Taking the dynamic torsion Ti-6Al-4V sample (TA-50) as an example, the peak temperature inside the adiabatic shear band is calculated and divided into three parts: ambient temperature, temperature caused by uniform and non-uniform deformation. The calculated peak temperatures were 669 and 665 ° C, respectively, for the two conditions (deduction of elastic strain from the local shear strain), within the temperature range of thermal recovery and recrystallization, the temperature at which the phase transition did not reach , Higher than the theoretically calculated value of Liao and Duffy (630 ℃). If the relationship between shear stress and local plastic shear strain can not be completely determined, proper approximation is necessary.