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학술대회자료
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대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2008년도 재료 및 파괴부문 춘계학술대회 강연 및 논문집
발행연도
2008.5
수록면
422 - 427 (6page)

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This study aims to investigate the how the temperature distribution at the joining interface influence on the weld characteristic of dissimilar friction welding of bulk metallic glasses(BMG) to crystalline metals. An infrared thermal imager (FLIR-ThermaCam SC-2000) was used to measure the temperature distribution at joining interface of the specimens during friction welding. Understanding the temperature distribution on the joining interface is important, because not only it determines whether the friction welding will be implemented successfully or not, but also it influences the residual stress, the crystallization of amorphous phase, and the eventually strength of the welds. A successful welding is achieved by using a friction welding apparatus which incorporates a pneumatic actuator and gripper to give a precise control of the friction time and pressure. The shape of the protrusion formed at the weld interface were examined. A Zr??Cu₄?Al₁? bulk metallic glasses and crystalline metals of Ti-alloys and Al-alloys were adopted as samples. In order to characterize the friction welded interface, the micrographic observation and the X-ray diffraction analysis on the weld cross-section were carried out. The obtained results were disussed based on the temperature distribution measured at the weld interface A successful joining of the bulk metallic glasses(BMG) to crystalline metals could be obtained for certain pairs of the material combination through the precise control of friction conditions. The residual strength after welding was evaluated by the four-point bending test and compared with the cases of friction welding to similar materials.

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Abstract
1. 서론
2. 실험 방법
3. 실험결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2009-550-018651761