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預(yù)變形對新型鋁鋰合金組織和性能的影響
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南京航空航天大學(xué),南京航空航天大學(xué)

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中圖分類號:

TG146.2 TG389

基金項目:

國家商用飛機制造工程技術(shù)研究中心創(chuàng)新基金（編號：SAMC13-JS-15-032）、中央高?；究蒲袠I(yè)務(wù)費專項資金（編號NZ2013307）


The Effect of Pre-deformation on Mocrostructure and Properties of a Novel Aluminum-lithium Alloy
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Nanjing University of Aeronautics and Astronautics,Nanjing University of Aeronautics and Astronautics

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    摘要:

    摘 要: 為了進(jìn)一步提高新型鋁鋰合金的強度及斷裂韌性，本文探索了預(yù)變形+人工時效對該合金組織和性能的影響。采用拉伸試驗、撕裂試驗測試材料性能并主要通過透射電鏡探索其相析出行為。結(jié)果表明，塑性變形導(dǎo)致大量T1相均勻彌散的析出在基體內(nèi)，使材料獲得了更為優(yōu)異的強度和韌性；同時，預(yù)變形有效避免了PFZ的形成與寬化。合金在經(jīng)過4.5%預(yù)變形+145℃，35h可獲得最優(yōu)的材料性能，實現(xiàn)了更好的強度與韌性匹配。

    Abstract:

    The effect of pre-deformation artificial aging on mocrostructure and properties of a novel aluminum-lithium alloy was investigated to achieve the superior combinations of strength and toughness. The mechanical properties were evaluated by tensile and tear test, and the precipitation behabiour was primarily characterized by TEM. The results indicated that the samples after a pre-deformation artificial aging possessed a preferable strength and toughness, owing to the precipitation of well-dispersed T1 (Al2CuLi) phases promoted by the plastic deformation. The formation and coarsening of PFZ were also effectively avoided in thie condition. The better combination of strength and toughness was obtained with the route of 4.5% pre-deformation 145℃, 35h aging.

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李華冠,陶杰.預(yù)變形對新型鋁鋰合金組織和性能的影響[J].稀有金屬材料與工程,2016,45(2):465~469.[LI HUAGUAN, TAO JIE. The Effect of Pre-deformation on Mocrostructure and Properties of a Novel Aluminum-lithium Alloy[J]. Rare Metal Materials and Engineering,2016,45(2):465~469.]
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  • 收稿日期:2014-03-19
  • 最后修改日期:2014-05-07
  • 錄用日期:2014-06-04
  • 在線發(fā)布日期: 2016-07-15
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