The Influence of Effective Strain on the Globular Microstructure by SIMA Process for Semi-Solid Forging

반용융 단조를 위한 SIMA 공정에서 유효 변형률이 구상화 조직에 미치는 영향

  • Park, H.J. (Dept.of Mechanical Design Engineering, Graduate School of Busan National University) ;
  • Lee, B.M. ;
  • Park, J.C.
  • Published : 1997.09.01

Abstract

For semi-solid forging, it is necessarily required to prepare a workpiece with globular microstructure. Among several processes to obtain golbular microstructure, SIMA process is very simple and advantageous with respect to equipment. This paper presents the influence of effective strain on the globularization with aluminium 2024 alloy in cold working stage by SIMA process. Upsetting and forward extrusion are tested for cold working and induction heating is also carried out for reheating to obtain golbular microstructure. Microstructure is observed with an optical microscope. And finite element simulations to obtain effective strain in cold working stage are performed by using commercial finite element code, DEFORM.