由裂断的机构来分,金属材料裂断的方式有二:即串晶裂断与晶粒间界裂断。前者是最为普遍的,几乎所有工程用金属材料是以这种方式而裂断的。一般地说来,串晶裂断又是靱性裂断,就是说,金属於裂断前,总是先经受了相当大量的范性形变,且多先产生“细颈”的。 晶粒间界裂断是力求避免的,因它多处脆性的。就是说,金属於裂断前,没有经受 By breaking the body to points, broken metal materials in two ways: that is, string crack and grain boundaries between the crack. The former is the most common, almost all of the engineering metal materials are broken in this way. In general, string crack is a rip fracture, that is, the metal before fracturing, always subject to a considerable amount of the first deformation, and more first produce a “narrow neck.” Intergranular fracture is to avoid, because of its brittleness. That is, the metal did not withstand before it broke