2124鋁合金蠕變時(shí)效的微結(jié)構(gòu)與性能
發(fā)布人：上海艾荔艾金屬材料有限公司www.85978597.cn
更新時(shí)間：2015-12-26
研究蠕變時(shí)效前預(yù)處理（15%預(yù)變形+100 ℃預(yù)時(shí)效5 h）對可熱處理強(qiáng)化2124鋁合金蠕變時(shí)效成形的影響。采用SEM分析、TEM分析以及測定電導(dǎo)率、維氏硬度和拉伸性能等手段，分析兩種不同初始狀態(tài)試樣經(jīng)過蠕變時(shí)效后的微結(jié)構(gòu)和性能。
2124鋁合金蠕變時(shí)效的微結(jié)構(gòu)與性能Microstructure and properties of creep aged 2124 aluminum alloy研究蠕變時(shí)效前預(yù)處理（15%預(yù)變形+100 ℃預(yù)時(shí)效5 h）對可熱處理強(qiáng)化2124鋁合金蠕變時(shí)效成形的影響。采用SEM分析、TEM分析以及測定電導(dǎo)率、維氏硬度和拉伸性能等手段，分析兩種不同初始狀態(tài)試樣經(jīng)過蠕變時(shí)效后的微結(jié)構(gòu)和性能。結(jié)果表明：初始預(yù)處理降低了蠕變時(shí)效過程中蠕變初始階段的蠕變伸長率，但增大了穩(wěn)態(tài)蠕變階段的蠕變速率；初始預(yù)處理對基體中粗大Fe、Si相有一定的破碎作用，蠕變時(shí)效過程中，粗大粒子在蠕變應(yīng)力作用下進(jìn)一步被破碎；預(yù)處理能夠改善第二相的析出形態(tài)和分布，使析出相分布均勻；預(yù)處理試樣的電導(dǎo)率比未預(yù)處理試樣的電導(dǎo)率高，其硬度和強(qiáng)度也較高，但伸長率較低。
The effect of pre-treatment（15% pre-deformation +100 ℃ pre-aging for 5 h）on creep age forming of aluminum alloy 2124 sheets, which can be enhanced by heat treatment, was investigated. The microstructures and properties of two sheets with different pre-treatments were analysed by means of SEM, TEM and measuring the electrical conductivity, Vickers hardness and tensile performance. The results show that the pre-treatment reduces the elongation of the initial stage of creep, but increases the steady-state creep rate; the coarse Fe and Si second phase particles are crushed to certain degree by the pre-treatment, and such coarse particles are further broken down by the subsequent creep stress. The morphology and distribution of the precipitated second phase particles are also improved by pre-treatment. The pre-treated sample depicts higher electrical conductivity, hardness and strength but smaller elongation rate than the non-pre-treated one.
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AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges.
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