金属材料内部裂纹愈合形态演化过程的扩散热力学分析

Thermodynamic analysis on morphological evolution of inner crack healing process in metal materials

扩散反应导致内裂纹的热愈合是目前普遍被接受的机理。文章利用扩散理论的唯象方法,探讨了热力学环境下所提供的能量补给形式进行的金属材料内裂纹愈合过程的形态演化过程。认为内裂纹愈合过程主要经历局部界面的弓出与接触、界面孔洞的形成及球形化、界面消失和球形孔洞的缩小3个阶段。

Mechanism of inner crack healing induced by diffusion reaction is accepted by people more and more. In this paper, Morphological Evolution of Inner Crack Healing Process in Metal Materials are discussed with phenomenal methods in the thermodynamic environment. This Morphological Evolution process can be divided into three main stages： Motion and closure of local interface, formation and Spheroidization of irregular hole. metallurgical bonding of local interface and diminishing of spherical void.