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首页> 外文会议>2006 BIMW >Microstructures and Mechanical Properties of an Al-Cu-Li-Mg-Zr Alloy Containing Zn and Mn
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Microstructures and Mechanical Properties of an Al-Cu-Li-Mg-Zr Alloy Containing Zn and Mn

机译：含锌和锰的Al-Cu-Li-Mg-Zr合金的组织和力学性能

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摘要

An Al-3.43Cu-1.28Li-0.49Mg-0.12Zr containing 0.62Zn and 0.29Mn was designed and the microstructures and mechanical properties of the alloy with various heat treatments were investigated. The precipitates of the alloy consist of Tl (Al_2CuLi), θ' (Al_2Cu) , a (Al_5Cu_6Mg_2) and δ' (Al_3Li). As solution temperature is changed from 485°C to 530°C, the solution degree of alloying elements in alloy increased, the amount of Tl in the alloy aged at 160°C for 18 h increased and that of θ' is decreased, resulting in an increase of strength. After solution treatment at 530°C, the alloy aged for 18 h at 145°C is mainly strengthened by G P zones, and a little amount of Tl precipitates. As aging temperature is increased to 160°C and 175°C, the strength increased, due to the sufficient precipitation of σ and Tl. The smaller amount of Tl in the alloy aged at 190°C is consistent with its lower strength. Meanwhile, it is found that the a precipitate does not coarsen as aging temperature increases in the range from 160°C to 190°C.
机译：设计了一种含0.62Zn和0.29Mn的Al-3.43Cu-1.28Li-0.49Mg-0.12Zr，并研究了该合金在不同热处理条件下的组织和力学性能。合金的析出物由T1（Al_2CuLi），θ'（Al_2Cu），a（Al_5Cu_6Mg_2）和δ'（Al_3Li）组成。随着固溶温度从485°C变为530°C，合金中合金元素的固溶度增加，在160°C时效18 h的合金中Tl的含量增加，而θ'的含量降低，导致增加力量。在530°C固溶处理后，在145°C时效18h的合金主要被G P区强化，少量的Tl析出。随着时效温度升高到160°C和175°C，由于σ和Tl的充分析出，强度增加了。在190°C时效的合金中，Tl含量较小与其强度较低相符。同时，发现在160℃至190℃的范围内，随着时效温度的升高，析出物不会粗大化。

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