Self-heating effect for thermomechanical forming processes turns out to be dramatically significant for material with a very low melting point, such as zinc alloys. Zinc low melting point temperature (419.54°C) accentuates metallurgical effects when it is formed in cold or warm manufacturing processes. During deformation, self-heating can therefore induce a relative softening in the behavior law (that could improve formability) which competes with the conventional plastic hardening of the material. Hence, the correct identification of zinc material behavior has to account for both softening and hardening phenomena. This paper studies the effect of plastic work energy in the material identified by means of tensile tests by combining digital image correlation and infrared thermography technique.

对于具有极低熔点的材料（例如锌合金），热机械成型工艺的自加热效果非常重要。锌的低熔点温度（419.54°C）在冷或热的制造过程中形成时，会增强冶金效果。因此，在变形期间，自热会导致行为定律相对软化（这可能会改善可成型性），与材料的常规塑性硬化相抗衡。因此，正确识别锌材料的行为必须考虑到软化和硬化现象。通过结合数字图像相关技术和红外热成像技术，研究了通过拉伸试验鉴定的材料中塑性功能的影响。