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首页> 外文会议>International Conference on Solid - Solid Phase Transformations in Inorganic Materials 2005 vol.1; 20050529-0603; Phoenix,AZ(US) >INFLUENCE OF COLD WORK AND SOLUTIONISING TEMPERATURE ON AGE HARDENING CAPABILITY OF Al-Mg-Mn ALLOYS WITH SMALL Cu AND Si ADDITIONS
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INFLUENCE OF COLD WORK AND SOLUTIONISING TEMPERATURE ON AGE HARDENING CAPABILITY OF Al-Mg-Mn ALLOYS WITH SMALL Cu AND Si ADDITIONS

机译：冷加工和固溶温度对添加少量铜和硅的Al-Mg-Mn合金的时效硬化能力的影响

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摘要

The influence of cold rolling and solution treatment on precipitation in Al-(1-3)Mg-0.25Mn-(0-0.4)Cu-0.15Si (wt%) alloys was investigated. After solutionising at 550℃, all alloys showed age hardening, and differential scanning calorimetry (DSC) confirmed the occurrence of precipitation reaction(s) in each alloy. After solutionising at 500℃, all Cu-containing alloys showed precipitation hardening; for Cu-free alloys, only the alloy with 1wt% Mg showed precipitation hardening, and no substantial precipitation hardening was observed for alloys with Mg content 2wt% or higher. This observed suppression of age hardening with increasing Mg content for Cu-free alloys was analysed with reference to the undissolved Mg_2Si intermetallics formed during solution treatment. These intermetallics were characterised using FEG-SEM and EDS. For the age hardening alloys solutionised at 500℃, both the time to peak ageing and the amount of precipitation hardening decrease with increasing cold rolling reduction.
机译：研究了冷轧和固溶处理对Al-（1-3）Mg-0.25Mn-（0-0.4）Cu-0.15Si（wt％）合金中析出的影响。在550℃固溶后，所有合金均显示时效硬化，差示扫描量热法（DSC）证实每种合金中均发生沉淀反应。在500℃固溶后，所有含Cu合金均表现出沉淀硬化。对于无铜合金，只有具有1wt％Mg的合金才显示出沉淀硬化，而对于具有2wt％或更高的Mg含量的合金，则没有观察到明显的沉淀硬化。参照固溶处理过程中形成的未溶解的Mg_2Si金属间化合物，分析了这种无铜合金随Mg含量增加而对时​​效硬化的抑制作用。使用FEG-SEM和EDS对这些金属间化合物进行了表征。对于在500℃固溶的时效硬化合金，随着冷轧压下量的增加，达到峰值时效的时间和析出硬化量均减少。

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