CAJ | 학술논문

通过对工业纯钛表面机械研磨(SMAT)这种变形方式的结果和微观组织变化的研究,分析了工业纯钛的品粒细化机制,讨论了其他剧烈塑性变形技术无法制备出晶粒尺寸更小的纳米晶的原因.结果表明:对于工业纯钛,SMAT这种具有高的应变速率和多方向载荷的变形方式,有利于形成细小的纳米晶;同时高应变速率增加了位错滑移的临界分切应力.
통과대공업순태표면궤계연마(SMAT)저충변형방식적결과화미관조직변화적연구,분석료공업순태적품립세화궤제,토론료기타극렬소성변형기술무법제비출정립척촌경소적납미정적원인.결과표명:대우공업순태,SMAT저충구유고적응변속솔화다방향재하적변형방식,유리우형성세소적납미정;동시고응변속솔증가료위착활이적림계분절응력.
The outcome and microstructure change of commercial pure titanium (CP-Ti) processed by surface mechanical attrition (SMAT) were analyzed. The grain refinement mechanism of SMAT CP-Ti was systematically investigated by means of transmission electron microscopy. The reason that other severe plastic deformation (SPD) can not obtain finer nano-crystalline was discussed. The experimental results show that the high-strain-rate and many direction loading are conductive to the formation ofnano-grains, and the high-strain-rate goes against dislocation slipping.