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电磁铸造对2024铝合金力学性能和组织的影响 郝海1,金俊泽1,贾非1,张兴国1,曹志强1 (1.大连理工大学铸造工程研究中心,大连,116024) 摘要:通过光学显微镜,差热分析仪和透射电子显微镜,对比分析了电磁铸造和连续铸造2024铝合金铸态及热处理态的显微组织和力学性能.电磁铸造铝锭的硬度较连续铸造铸锭提高1倍,疲劳性能提高2倍.差热分析曲线显示,电磁铸造试样具有比连续铸造高的热焓,说明其在加热过程中沉淀强化物析出较多. 关键词:电磁铸造; 连续铸造; 铝合金; 显微组织; 力学性能; [全文内容正在添加中] ......
High cycle fatigue and fracture behavior of 2124-T851 aluminum alloy LI Xue(李雪)1, YIN Zhi-min(尹志民)1, NIE Bo(聂波)1, 2, ZHONG Li(钟利)1, 2, PAN Qing-lin(潘清林)1, JIANG Feng(姜锋)1 1. School of Materials...> Abstract: The high cycle fatigue properties and fracture behavior of 2124-T851 aluminum alloy were investigated roundly, including the fatigue crack growth rate, fracture......
the strength and wear resistance of aluminum alloy parts in automotives. Long duration time as well as long pre-sputtering time are required for plasma nitriding of aluminum or its alloys only with the thickness of a few micrometers. New plasma inner nitriding is proposed to realize the fast-rate nitriding of aluminum alloys. Al-6Cu alloy is employed as a targeting material in order to demonstrate......
Numerical simulation of continuous roll-casting process of aluminum alloy XIE Shui-sheng(谢水生), YANG Hao-qiang(杨浩强), HUANG Guo-jie(黄国杰) State Key Laboratory for Fabrication and Processing of Non... of continuous roll-casting process (CRP) of aluminum alloy, the investigations of the flow behavior within the metal pool, the heat transfer condition between roll and strip, the pouring temperature......
2024铝合金中沉淀相对PLC效应的影响 熊少敏1,张青川1,曹鹏涛1,肖锐1 (1.中国科技大学中国科学院材料力学行为和设计重点实验室,合肥,230027) 摘要:对2024铝合金进行不同温度下的热处理,得到了一系列具有不同溶质原子浓度的基体及析出相含量的铝合金试样.将这些试样分别在低温(-100℃)和室温(25℃)下进行拉伸实验,分析其锯齿幅值和临界应变随应变率的变化趋势.结果表明,溶质原子是Portevin-Le Chatelier(PLC)效应的必要因素,单纯的位错切割沉淀相不足以产生PLC效应,只能影响PLC效应,并且沉淀相对PLC效应的影响在中等拉伸应变率时表现明显. 关键词:2024铝合金; PLC效应; 锯齿幅值; 临界应变; 热处理; 2024 Al alloy; Portevin-Le Chatelier(PLC)effect; magnitude......
Compressive formability of 7075 aluminum alloy rings under hydrostatic pressure LIU Gang(刘 钢), WANG Li-liang(王礼良), YUAN Shi-jian(苑世剑), WANG Zhong-ren(王仲仁) School of Materials Science... of the ring, numerical simulation and experimental research were carried out. The effect of hydrostatic pressure on the deformation of aluminum alloy 7075 ring was obtained by numerical simulation......
Joint performance of laser-TIG double-side welded 5A06 aluminum alloy CHEN Yan-bin(陈彦宾), MIAO Yu-gang(苗玉刚), LI Li-qun(李俐群), WU Lin(吴 林) State Key Laboratory of Advanced Welding Production... of the welds of laser-TIG double-side welded 5A06 aluminum alloy was investigated. The results show that the weld cross-sectional shape has an intimate relation with the mechanical properties......
2024铝合金的搅拌摩擦焊接工艺及显微组织 黄明辉1,周鹏展1,彭成章2 (1.中南大学,机电工程学院,湖南,长沙,410083;2.湘潭工学院,机械系,湖南,湘潭,411201) 摘要:对厚度为6 mm的2024铸铝合金板做了搅拌摩擦焊接工艺试验.通过对焊接件拉伸强度测试,以及在光学显微镜和扫描电镜下对焊缝和基体显微组织的观察,发现焊缝比基体具有更细小的晶粒组织,粗大的θ(CuAl2)相被破碎,且有害杂质相容易在晶界上析出.试验结果表明,焊接速度为30 mm/min和焊接头旋转速度为1 000 r/min时,可以获得良好的焊接质量.图5,表2,参6. 关键词:搅拌摩擦焊接; 显微组织; 铝合金; [全文内容正在添加中] ......
