A calorimetric study of aluminium alloy AA-7075
A calorimetric study of aluminium alloy AA-7075
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铝合金AA-7075的量热研究
DOI：
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发表时间：
1982
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影响因子：
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通讯作者：
M. Chaturvedi
中科院分区：
文献类型：
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作者：
D. Lloyd;M. Chaturvedi
用差示扫描量热法（DSC）研究了工业用AA-7075铝锌镁铜合金的析出过程。在一般情况下，结果是在一个类似的合金与以前的DSC数据很好的协议，并可以通过电子显微镜观察到的沉淀过程。然而，一个额外的沉淀过程已被检测到在低温下，这通常是掩盖了在室温时效过程中形成的Guinier-Preston（G-P）区的粗化和溶解。这种沉淀物在莱曼等人之后被称为η′的“前体”，在达到较高温度时不会再溶解，并且是这些合金中老化过程中的重要步骤。
The differential scanning calorimetry (DSC) technique has been used to examine the precipitation process in the commercial Al-Zn-Mg-Cu alloy AA-7075. In general the results are in good agreement with previous DSC data on a similar alloy and can be related to the precipitation process observed by electron microscopy. However, an additonal precipitation process has been detected at low temperatures, which is usually masked by coarsening and dissolution of Guinier-Preston (G-P) zones formed during room-temperature ageing. This precipitate, which is referred to as the “precursor” to η′ after Lyman et al., does not redissolve on going to higher temperatures and is an important step in the ageing process in these alloys.