Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Structural Disordering and Relaxation Process in an Amorphous Alloy

비정질 합금의 구조완화 및 구조무질서화

  • Kim, Hyun-Su (Department of Materials Science and Engineering, Korea University) ;
  • Yoon, Kyeu-Sang (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Jae-Chul (Department of Materials Science and Engineering, Korea University)
  • 김현수 (고려대학교 신소재공학과) ;
  • 윤규상 (고려대학교 신소재공학과) ;
  • 이재철 (고려대학교 신소재공학과)
  • Received : 2011.05.16
  • Published : 2011.11.25
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Abstract

Structural change in an amorphous alloy was measured by applying a load below the global yield stregth at ambient temperatures. It was observed that the magnitude of the apparent structural change occuring in the amorphous alloy is determined by the compatative relationship between the stress-induced disordering process and the thermally-activated relaxation process. Structural disorder was observed to take place even at a stress well below the global yield, and the degree of the disorder was increased abruptly at the earlier stage of loading and saturated with time. In the mean time, unlike the previous belief, the relaxation process was observed to occur even at embient temperatures, and the degree of the relaxation was observed to increase linearly with time. The analytical equation predicting the structural change was proposed.

Keywords

Acknowledgement

Supported by : 한국연구재단

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