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Fracture Characteristic of TiNi/A16061 Share Memory Alloy Composite using Acoustic Emission Technique

AE 기법을 이용한 TiNi/A16061 형상기억복합재료의 파괴특성평가

  • 이진경 (동의대학교 기계공학과) ;
  • 박영철 (동의대학교 기계공학과) ;
  • 구후택 (동아대학교 대학원) ;
  • 박동성 (동아대학교 대학원) ;
  • 이규창 (산업과학연구원 신뢰성 평가센타)
  • Published : 2002.02.01

Abstract

Tensile residual stress happen by difference of coefficients of thermal expansion between fiber and matrix is one of the serious problems in metal matrix composite(MMC). In this study, TiNi fiber was used to solve the tensile residual stress as the reinforced material. TiNi fiber improves the tensile strength of composite by occurring compressive residual stress in matrix using shape memory effect of it. Pre-strain was added to generate compressive residual stress inside TiNi/A16061 composite. It was also evaluated the effect of compressive residual stress corresponding to pre-strains variation. AE technique was used to clarify the microscopic damage behavior at high temperature and the effect of pre-strain difference of TiNi/A16061 shape memory alloy composite.

Keywords

Tensile Residual Stress;Shape Memory Effect;Pre-Strain;Acoustic Emission(AE) Technique;SMA

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