Uncertainty Evaluation on Testing Results of Tensile Strength of Friction Stir Welding Joints of 2A70 Aluminium Alloy
摘 要
依照GB/T 2651-2008《焊接接头拉伸试验方法》对2A70铝合金搅拌摩擦焊T型接头的抗拉强度进行了测定, 并对抗拉强度测定结果的不确定度进行了评定。结果表明: 当置信度取95%, 包含因子取2, 该接头抗拉强度测定结果的扩展不确定度为14 Mpa, 相对扩展不确定度为3.8%; 不确定报告可表示为Rm=(370±14)MPa, v=81,k=2。
Abstract
The tensile strength of friction stir welding T-joints of 2A70 aluminium alloy was tested according to GB/T 2651-2008 “Method of Tensile Test for Welded Joint”, and uncertainty of the tensile strength testing results was evaluated. The results show that the expanded uncertainty and relative expanded uncertainty of tensile strength of the T-joints were 14 MPa and 3.8% respectively, when the confidence level was 95% and coverage factor was 2. Therefore, the uncertainty report can be expressed as follow: Rm=(370±14) MPa, v=81, k=2.
中图分类号 V462
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收稿日期 2010/8/31
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备注燕翔, (1977-), 男, 工程师
引用该论文: YAN Xiang,ZHANG Zhen-yu,QIAO Feng-lin. Uncertainty Evaluation on Testing Results of Tensile Strength of Friction Stir Welding Joints of 2A70 Aluminium Alloy[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2011, 47(6): 361~364
燕翔,张振宇,乔凤林. 2A70铝合金搅拌摩擦焊接头抗拉强度测定结果的不确定度评定[J]. 理化检验-物理分册, 2011, 47(6): 361~364
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参考文献
【1】机械工业理化检测人员技术培训和资格鉴定委员会.力学性能试验[M]. 北京: 中国计量出版社, 2008.
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