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1973高強高韌鋁合金的時效析出及硬化行為
發(fā)布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-11-03
采用透射電子顯微鏡(TEM)、選區(qū)電子衍射(SADP)和硬度測試等手段研究1973高強高韌鋁合金在不同溫度下的單級時效析出及硬化行為。
1973高強高韌鋁合金的時效析出及硬化行為Ageing precipitation and hardening behavior of 1973 high strength andhigh toughness aluminum alloy
采用透射電子顯微鏡(TEM)、選區(qū)電子衍射(SADP)和硬度測試等手段研究1973高強高韌鋁合金在不同溫度下的單級時效析出及硬化行為。結(jié)果表明：1973鋁合金在120和140 ℃有很強的抗過時效能力，峰時效過后，硬度在長時間內(nèi)基本保持在195 HV附近。1973鋁合金的析出序列為：α過飽和固溶體(SSS)→GPⅠ區(qū)/GPⅡ區(qū)→η'亞穩(wěn)相→η平衡相→T相。在140 ℃單級時效過程中，GPⅡ區(qū)和η'相一直都存在于時效合金中，對合金起著最大的強化作用。
The ageing precipitation and hardening behavior of 1973 high strength and high toughness aluminum alloy were studied by means of transmission electron microscopy (TEM), select area electron diffraction (SAED) and hardness measurements at different ageing temperatures. The results show that this alloy has obvious anti-over-aging capability at 120 and 140 ℃. And this alloy can keep the hardness of 195 HV in a long time after peak-ageing. Furthermore, the precipitation sequence of 1973 aluminum alloy can be described as follows: supersaturated solid solution(α)→ GPⅠ/GPⅡ zone→ metastable η'→ stable η→T phase. There are GPⅡ zone and η' phase with the greatest strengthening effect on the 1973 aluminum alloy during the whole ageing process at 140 ℃.
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