https://scholars.lib.ntu.edu.tw/handle/123456789/424836
標題: | Size effect and strain induced double twin by nanoindentation in DSS weld metal of vibration-assisted GTAW | 作者: | Hsueh C.-H. Liao M.-J. Wang S.-H. Tsai Y.-T. Yang J.-R. Wu R. CHUN-HWAY HSUEH JER-REN YANG |
關鍵字: | Duplex stainless steel;Nanoindentation;V-shaped double twin;Vibration assisted welding | 公開日期: | 2018 | 卷: | 219 | 起(迄)頁: | 40-50 | 來源出版物: | Materials Chemistry and Physics | 摘要: | The nanohardness values and modulus of the prior £_ phase in both direct current (DC) and vibration-assisted (VIB) weld metal were higher than those of the base metal. The dislocation density in the £_ phase matrix was the highest in the VIB weld metal, followed by the DC weld metal and the base metal. Therefore, the higher nanohardness value in the £_ phase, especially for the VIB welding, was attributed to the existence of a higher dislocation density. By contrast, the nanohardness values of the £^ phase in both weld metals were not affected by the welding process. The predicted nanohardness value of the composite phase with the rule-of-mixture was consistent with the result of nanoindentation measurements. The deformation induced a V-shaped double twin was revealed by the effect of nanoindentation on the austenite grain of the VIB weld metal. ? 2018 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/424836 | ISSN: | 02540584 | DOI: | 10.1016/j.matchemphys.2018.07.055 |
顯示於: | 材料科學與工程學系 |
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