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The Fretting Fatigue Behavior of Ti-6Al-4V Alloy on Change of Microstructure

Ti-6Al-4V 합금의 조직 변화에 따른 프레팅 피로거동

  • 배용탁 (영남대학교 대학원 기계공학부) ;
  • 최성종 (영남대학교 기계공학부) ;
  • 권재도 (영남대학교 기계공학부)
  • Published : 2005.04.01

Abstract

The effect of microstructure on mechanical behavior for Ti-6Al-4V alloy was studied. Two different kinds of specimens are prepared using heat treatments (rolled plate, $1050^{\circ}C)$ in order to Produce different microstructures. Various kinds of mechanical tests such as hardness, tensile, fatigue and fretting fatigue tests are performed for evaluation of mechanical properties with the changes of microstructures. Through these tests, the following conclusions are observed: 1) Microstructures are observed as equiaxed and $widmanst{\ddot{a}}ten$ microstructures respectively. 2) Impact absorbed energy is superior for the equiaxed microstructure, and the hardness and tensile strength are superior for the $widmanst{\ddot{a}}ten$ microstructure. 3) The fatigue endurance of $widmanst{\ddot{a}}ten$ microstritcture shows higher value than that of the equiaxed microstructure. 4) The fatigue endurance in fretting condition was reduced about $50{\%}$ from that of the non-fretting condition.

Keywords

Ti-6Al-4V Alloy;Equiaxed Microstructure;Lamellar Micro-structure;Plain Fatigue Limit;Fretting Fatigue Limit

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