Mechanical Properties and Temperature Distributions of Thin Friction Stir Welded Sheets of AA5083
Mechanical Properties and Temperature Distributions of Thin Friction Stir Welded Sheets of AA5083
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DOI：
10.5923/j.mechanics.20120201.01
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
S. Sattari;H. Bisadi;M. Sajed
中科院分区：
文献类型：
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作者：
S. Sattari;H. Bisadi;M. Sajed
无论是传统方法还是新开发的方法，薄板焊接都是一个复杂的过程。在这种搅拌摩擦焊接 (FSW) 方法中，研究了厚度为 0.8 毫米的 5083 铝板。使用了专为超薄板材设计的特殊夹具和简单的圆柱形工具。进行了拉伸试验和显微硬度试验。所有测试样品均无缺陷。机械性能表明，旧样品的屈服应力低于母材金属，并且通过增加速比（w/v），显微硬度的平均值降低。速比范围为18.58～34.84时焊接的样品具有最佳的拉伸试验质量和显微硬度。焊接过程中的温度测量表明，430 0C 至 510 0C 是无缺陷接头的最佳温度范围。使用扫描电子显微镜 (SEM) 分析断口表面，显示无缺陷接头处的凹坑断裂。
Thin sheets welding are a complicated process either in conventional or newly developed methods. In this approach friction stir welded (FSW), 0.8mm in thickness 5083 aluminium sheets have been studied. A special fixture, de- signed for ultra-thin sheets, and a simple cylindrical tool, was used. Tensile test and micro hardness test was investigated. All tested samples are defects free. Mechanical properties show that yield stress off old samples are below the base metal and by increasing in speed ratio (w/v) the average of micro hardness was decreased. Samples were welded at speed ratio range of 18.58 to 34.84 have the best quality of tensile test and micro hardness. Temperature measurement during welding indicate that 430 0C to 510 0C is the best temperature range for defect free joints. Fracture surface analyzed using scanning electron microscope (SEM) which represented Dimpled rupture at defect free joints.