Thixoforming of Aluminum A201- Expectations and Fulfilment
Thixoforming of Aluminum A201- Expectations and Fulfilment
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铝 A201 的触变成型 - 期望和实现
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发表时间：
2019
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通讯作者：
P. Kapranos
中科院分区：
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作者：
P. Kapranos
触变成形作为半固态金属加工（SSM）路线是金属在半固态（即在完全固态和完全液态之间的凝固或熔化范围内）下的近净成形。铝A201是一种含铜铸造合金，另外还含有少量的镁、硅和银。虽然这种合金很难铸造，但它对时效硬化的响应特别高，因此提供了接近锻造2014合金的机械性能。在谢菲尔德大学对A201合金进行的合金开发实验表明，该合金的原料可以生产出具有适合触变成形的均匀非枝晶微观结构，在这些条件下表现出触变性质，可以成形为复杂的近净形部件，并在适当的热处理后产生令人印象深刻的机械性质。A201铝合金坯料在半固态下触变成形，并在进行机械测试之前先进行T7热处理，然后进行T6热处理，其性能接近2000系列锻造铝合金的性能。本文综述了迄今为止在半固态A201铝合金成形方面所做的工作，描述了该领域研究人员的希望、期望和成就。
Thixoforming as a Semi-Solid Metal Processing (SSM) route is a near net shape forming of metals in the semi-solid state, i.e. within the freezing or melting range between the fully solid and fully liquid states. Aluminum A201 is a copper containing casting alloy with additional small quantities of magnesium, silicon and silver. Although this alloy is difficult to cast, it has a particularly high response to age-hardening and therefore offers mechanical properties close to the wrought 2014 alloy. Alloy development experiments carried out at the University of Sheffield on A201 alloy have shown that feedstock of this alloy can be produced having uniform non-dendritic microstructures amenable to thixoforming, exhibits thixotropic properties under these conditions, can be shaped into complex near net-shape parts and develops impressive mechanical properties after appropriate heat treatment. A201 aluminum alloy billets when thixoformed in the semi-solid state and heat treated with a T7 followed by T6 treatment before being mechanically tested, have exhibited properties approaching those of wrought 2000 series aluminum alloys. Here follows a review of work done to date on shaping the A201 aluminum alloy in the semi-solid state, describing the hopes, expectations and fulfilment of researchers in the field.