中文摘要：

调查由作者和合作者转变为微结构和破裂方面断热砍变硬的钢和 Ti 合金的乐队(ASB ) 由高速度用机器制造导致了(高速存储器) 简短被考察。主要调查结果是下列：在 ASB 内的微观结构从乐队中心改变到正常薄片材料的(a) ，坡度微观结构被发现；HSM 能生产的(b) 有在切增加的 ASB 的二种类型加速，使变形砍在更低的切形成的乐队加速并且转变砍在更高的切形成的乐队加速；(c) 小 equiaxed 重新使结晶谷物在 ASB，动态再结晶和阶段转变的中心被观察可以在转变 ASB 的形成期间同时发生；(d) 动态旋转再结晶是在 ASB 的中心的 equiaxed 谷物的起源。在为 harden 钢在高速存储器期间生产的 ASB 的一个微结构进化模型被建议；(e) 破裂表面的微结构模式被伸长的酒窝描述。一小宇宙断热砍破裂模型在变硬的钢的高速存储器期间被建立。

英文摘要：

Investigations made by the authors and collaborators into the microstructural and fracture aspects of adiabatic shear bands （ASBs） of the hardened steels and Ti alloys induced by high speed machining （HSM） are briefly reviewed. The principal findings are the following： （a） the microstructure inside the ASBs varies from the band center to the normal chip material, the gradient microstructures are found; （b） the HSM can produce two types of ASBs with increasing in cutting speed, the deformed shear bands formed at lower cutting speed and the transformed shear bands formed at higher cutting speed; （c） the very small equiaxed recrystallized grains are observed in the center of the ASBs, the dynamic recrystallization and phase transformation may occur simultaneously during the formation of the transformed ASBs; （d） The dynamic rotational recrystallization is the origin of the equiaxed grains in the center of the ASBs. A microstructural evolution model in ASBs produced during HSM for the harden steel is proposed; （e） the microstructural pattern of fracture surface is characterised by the elongated dimples. A microcosmic adiabatic shear fracture model during HSM of the hardened steel is built up.