Enhanced elevated-temperature properties via Mo addition in Al-Mn-Mg 3004 alloy
Enhanced elevated-temperature properties via Mo addition in Al-Mn-Mg 3004 alloy
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DOI：
10.1016/j.jallcom.2016.10.005
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发表时间：
2017-02-15
影响因子：
6.2
通讯作者：
Chen, X. -Grant
中科院分区：
文献类型：
--
作者：
Liu, K.;Ma, Hezhaoye;Chen, X. -Grant
本文研究了在Al-Mn-Mg 3004合金中添加Mo对合金高温性能的影响以及在350 ℃和400 ℃下长期热保持时的热稳定性。在铸态和热处理条件下，显微硬度和屈服强度均随Mo含量的增加而增加，并在Mo含量为0.3wt. %，然后是平台期。在优化的Mo含量（0.3wt. %）时，弥散相的体积分数增加，而无弥散相区的体积百分比大大降低，从而使合金的高温强度和抗蠕变性能显著提高。长期热保持的结果表明，与基体合金的高温强度和抗蠕变性迅速下降相比，含0.3%Mo的Al-Mn-Mg合金在350 ℃以下热稳定，在400 ℃时稳定性略有下降。高高温性能和在350-400 ℃下添加Mo的优异热稳定性的组合使Al-Mn-Mg 3xxx合金成为高温应用的有前途的候选者。(C)2016爱思唯尔B. V.保留所有权利。
The present work investigates the influence of adding Mo to an Al-Mn-Mg 3004 alloy on elevated temperature properties as well as their thermal stability during long-term thermal holding at 350 degrees C and 400 degrees C. In as-cast and heat-treated conditions, both microhardness and yield strength increase with increasing Mo contents and reach peak values at 0.3 wt. % followed by a plateau. With an optimized Mo content (0.3 wt. %), the volume fraction of dispersoids is increased while the volume percentage of the dispersoid-free zone is greatly reduced compared to the base alloy free of Mo, resulting in the remarkable increases in elevated-temperature strength and creep resistance. The results of the long-term thermal holding show that compared with the rapid drop of elevated-temperature strength and creep resistance in the base alloy, the Al-Mn-Mg alloy with 0.3% Mo is thermally stable up to 350 degrees C, exhibiting a slight decrease of stability at 400 degrees C. The combination of high elevated-temperature properties and their excellent thermal stability at 350-400 degrees C with Mo addition makes Al-Mn-Mg 3xxx alloys the promising candidates for elevated-temperature applications. (C) 2016 Elsevier B.V. All rights reserved.