拉伸與軋制預(yù)變形對(duì)2519A鋁合金組織與力學(xué)性能的影響
發(fā)布人：上海艾荔艾金屬材料有限公司www.bt990.com.cn
更新時(shí)間：2015-12-21
通過硬度測(cè)試、拉伸測(cè)試、透射電鏡分析以及織構(gòu)測(cè)試等手段，研究拉伸和冷軋兩種不同預(yù)變形方式對(duì)2519A鋁合金165 ℃時(shí)效后組織與力學(xué)性能的影響。
拉伸與軋制預(yù)變形對(duì)2519A鋁合金組織與力學(xué)性能的影響Effects of stretching and rolling pre-deformation on?microstructures and mechanical properties of 2519A aluminum alloy?通過硬度測(cè)試、拉伸測(cè)試、透射電鏡分析以及織構(gòu)測(cè)試等手段，研究拉伸和冷軋兩種不同預(yù)變形方式對(duì)2519A鋁合金165 ℃時(shí)效后組織與力學(xué)性能的影響。結(jié)果表明：適當(dāng)?shù)淖冃瘟烤功取湎喑叽缂?xì)小、密度增加，而變形量過大使θ′相分布變得較不均勻，合金強(qiáng)度提高不大，而塑性降低；6%拉伸預(yù)變形和7%冷軋預(yù)變形使合金板材峰值時(shí)效抗拉強(qiáng)度、屈服強(qiáng)度和伸長(zhǎng)率分別為472 MPa、404 MPa、15.6%和472 MPa、417 MPa、9.4%，二者的抗拉強(qiáng)度基本相同，但前者的屈服強(qiáng)度低、塑性高；兩種預(yù)變形方式下板材織構(gòu)類型相同，取向密度無明顯差別；合金板材屈服強(qiáng)度和伸長(zhǎng)率的差別由第二相θ′相的數(shù)量、尺寸和分布所確定。
The effects of stretching and rolling pre-deformation on the microstructures and mechanical properties of 2519A alloy plate aged at 165 ℃ were investigated by hardness test, tensile test, transmission electron microscopy(TEM) and texture measurement. The results show that for both of the pre-deformation methods, proper pre-deformation leads to the quantity increasing and refinement of θ′ phase. But the inordinate deformation leads to an inhomogeneous distribution of θ′ phase, which decreases the elongation. For the 6% pre-stretching elongation and 7% pre-cold cooling deformation, the tensile strength, yield strength and elongation are 472 MPa, 404 MPa, 15.6% and 472 MPa, 417 MPa, 9.4%, respectively. Both of their tensile strengths are equivalent, but the yield strength of the pre-stretched alloy plate is lower, while the elongation is higher. The texture components and orientation density of the pre-stretched and pre-rolled alloy plates are almost the same, therefore, the yield strength of the alloy plate is determined by the quantity, size and θ ′ phase distribution.
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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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