Deformations and Damage Evolution of Austenitic Steel AISI304 with Martensite Phase Transformation
In the present paper martensite transformation in stainless steel 304 and its effects to material damage is discussed.The experiments confirm that martensite phase transformation in SS304 can be described by the Santacreu model and shows dependence on the plastic strain and stress triaxiality.The plasticity model with the martensite transformation is established based on Santacreu model and applied to describe plastic behavior of SS304 with severe plastic deformations.It is shown that the plasticity model predicts strain hardening under both compression and tension uniformly and agrees with experimental results reasonably.Although the fracture strain of SS304 can be characterized by the equivalent plastic strain precisely,fatigue tests display strong influence of the pre-strains to the fatigue life.Whereas the strain-fatigue life curve shows acceleration of fatigue damage in strain-controlled fatigue tests,the stress versus fatigue life curve reveals significantly higher bearing capacity due to pre-strains.This result implies that application of the pre-strain should only be used if the mechanical loading is applied in stress-controlled cases.
deformation induced phase transformation plasticity mode fatigue damage fatigue life
Gang Han Huang Yuan
School of Mechanical Engineering,Beijing Institute of Technology,100081,China School of Mechanical Engineering,Beijing Institute of Technology,100081,China;Department of Mech.Eng
国际会议
北京
英文
1-11
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）