Mechanical and microstructural characterization of 2124Al/25 vol.%SiCp joints obtained by linear friction welding (LFW)
Mechanical and microstructural characterization of 2124Al/25 vol.%SiCp joints obtained by linear friction welding (LFW)
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DOI：
10.1016/j.compositesa.2010.03.009
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发表时间：
2010-09
影响因子：
8.7
通讯作者：
F. Rotundo;L. Ceschini;A. Morri;T. Jun;A. Korsunsky
中科院分区：
文献类型：
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作者：
F. Rotundo;L. Ceschini;A. Morri;T. Jun;A. Korsunsky
本研究的目的是评估使用线性摩擦焊（LFW）技术在2124 Al/25vol. %的铝合金上产生良好接头的可能性。SiCp复合材料。MMC接头进行显微组织和机械特性，包括硬度，拉伸和疲劳试验，没有任何焊后热处理。显微组织分析表明，基本上无缺陷的接头，在中心区域的颗粒分布均匀，铝基体合金的相关塑性流动。相对于母材，焊接区的硬度下降约10%。接头效率高于80%，无论是在极限拉伸强度和疲劳强度在107次循环。使用最大似然法计算S-N概率曲线。通常，断裂发生在热机械影响区（TMAZ），断裂伸长率相应降低。
The aim of this study is to evaluate the possibility of using the linear friction welding (LFW) technique to produce sound joints on a 2124Al/25vol.%SiCpcomposite. The MMC joints were subjected to microstructural and mechanical characterization, including hardness, tensile and fatigue tests, without any post-weld heat treatment. The microstructural analyses showed substantially defect-free joints, with a uniform particle distribution in the central zone and a relevant plastic flow of the aluminium matrix alloy. The hardness decrease in the welded zone was approximately 10% in respect to the base material. The joint efficiency was higher than 80%, both in respect to the ultimate tensile strength and fatigue strength at 107cycles. S–N probability curves were calculated using the maximum likelihood method. Generally, the fracture occurred in the Thermo-Mechanically Affected Zone (TMAZ), with a relevant reduction in the elongation to failure.