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ZHY864684843木虫 (著名写手)
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Tensile properties
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Base metals and welded joints in the Al-4Zn-1Mg alloys were subjected to tensile testing after T6 heat treatment. In each condition, five specimens were tested and a range of tensile strength value had been presented in Table1. Table 1 summarizes the tensile test results. It is worth noting that the tensile strengths of original parent metals and MIG joints for T6 condition are 374~384 MPa and 315~320 MPa, respectively. This indicates that there is about 15.8% reduction in strength values 1398 Materials Processing Technology, ICAMMP2011 due to MIG welding. The elongation of original parent metals and MIG joints for T6 condition are 9.9~10.5% and 4.8~5.2%, respectively. This suggests that there is a significant loss of ductility in the joint. These low ductilities can be attributed to strain concentration in the lower strength fusion zone resulting from the loss of strength. However, the joint efficiency of MIG joints in the Al-4Zn-1Mg alloy was found to be reasonably high, i.e. 83.3~84.2%, the metal inert gas welding technique is found to improve the joint efficiency irrespective of the welding processes |
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ZHY864684843
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2楼2016-08-05 17:38:03
jiangguofeng
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ZHY864684843: 金币+10, 翻译EPI+1, ★★★很有帮助 2016-08-08 19:26:11
ZHY864684843: 金币+10, 翻译EPI+1, ★★★很有帮助 2016-08-08 19:26:11
| Al-4Zn-1Mg合金的母体金属和焊缝经T6热处理后进行抗拉试验。 在每种条件下，进行五个样品的试验,抗拉强度数据列于表1。 表1总结了最抗拉试验的结果。 值得注意的是用于T6条件的原始底层金属和惰性气体金属电弧焊接头的抗张强度分别为374-384兆帕和315-320兆帕。 这表明，由于采用气体保护金属电极电弧焊，强度值1398材料加工技术, ICAMMP2011约有15.8%的降低。 用于T6条件的原始底层金属和惰性气体金属电弧焊接头的延伸率分别为9.9～10.5%和4.8～5.2%。。 这表明接头中的延伸性有明显的损失。 这些低延伸性可归因于强度损失导致的低强度母材熔合区中的应变集中所致。 然而, 发现Al-4Zn-1Mg合金中的惰性气体金属电弧焊接头的接合效率却相当地高, 即83.3～84.2%,据发现，不考虑焊接工艺，这种惰性气体金属电弧焊技术改善了接合效率 |
3楼2016-08-06 10:11:31
