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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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汽车车身用Al-Mg-Si-Cu合金薄板应变强化行为的研究
DOI: DOI:10.3724/SP.J.1037.2009.00799, PP. 613-617
Keywords: Al-Mg-Si-Cu合金,汽车板,应变强化,应变强化指数
Abstract:
针对汽车车身用Al-0.9Mg-1.0Si-0.7Cu-0.6Mn合金薄板,通过固溶、T4及退火处理控制其合金相组态,采用拉伸实验结合TEM/EDS观察研究了薄板在拉伸变形过程中的应变强化指数$n$值的变化规律及其应变强化行为.结果表明,Al-0.9Mg-1.0Si-0.7Cu-0.6Mn合金薄板的拉伸真应力-真应变不完全满足Hollomon公式,其对应于不同应变阶段的强化指数n各不相同;塑性变形早期,退火态合金薄板的应变强化效应最显著,塑性变形后期,固溶态合金薄板的应变强化效应最显著;拉伸变形任意应变范围内,固溶态合金薄板的应变强化指数n均高于T4态,其原因是固溶态合金薄板位错滑移的切应力明显小于T4态合金薄板.
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