当前位置: X-MOL 学术Mater. Sci. Eng. A › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Second phase particles and mechanical properties of 2219 aluminum alloys processed by an improved ring manufacturing process
Materials Science and Engineering: A ( IF 6.4 ) Pub Date : 2020-03-16 , DOI: 10.1016/j.msea.2020.139226
Xianchang Mao , Youping Yi , Hailin He , Shiquan Huang , Wanfu Guo

2219 Al alloy has been used to manufacture the launch vehicle storage tank transition ring, but the large ring obtained in conventional manufacturing processes still suffers from severely agglomerated coarse second phase particles and poor mechanical properties. An improved process (forging at 510 °C with 20% deformation and at 240 °C with 50% deformation, then rolling at 240 °C with 30% deformation, followed by solid solution at 538 °C for 4 h and T8 treatment) for 2219 Al alloy large ring manufacturing was proposed, and the corresponding simulation tests were carried out. The evolution of Al2Cu second phase particles and the mechanical properties of the produced workpieces were investigated. The results showed that the degree of crushing, dissolution, and precipitation of Al2Cu particles were significantly improved in the improved process, and the area fractions of Al2Cu coarse second phase particles after saddle forging and rolling were significantly reduced, leading to 2.4 times increase in area fraction of the θ′ phase after T8 treatment. More homogeneous slip occurred during the tensile testing process and intergranular fracture was the main fracture mechanism. The tensile strength σb, yield strength σs, and elongation δ in the radial direction of the 2219 workpieces were increased to 491 MPa, 388 MPa, and 13.1%, where were increases of 11%, 14%, and 68%, respectively. The uniformity in σb, σs, and δ of the 2219 workpieces increased by 57%, 38%, and 64%, respectively.



中文翻译:

通过改进的环制造工艺加工的2219铝合金的第二相颗粒和力学性能

2219铝合金已被用于制造运载火箭储罐过渡环,但是在常规制造工艺中获得的大环仍然遭受严重凝聚的第二相粗颗粒和较差的机械性能的困扰。改进的工艺(在510°C下以20%的变形锻造,在240°C下以50%的变形锻造,然后在240°C下以30%的变形轧制,然后在538°C下固溶4小时并进行T8处理)提出了2219铝合金大环的制造方法,并进行了相应的模拟试验。研究了Al 2 Cu第二相颗粒的演变以及所生产工件的机械性能。结果表明,Al 2的破碎,溶解和沉淀程度在改进工艺中,Cu颗粒得到了显着改善,鞍锻造和轧制后的Al 2 Cu粗大第二相颗粒的面积分数显着降低,导致T8处理后θ'相的面积分数增加2.4倍。在拉伸试验过程中发生了更多的均匀滑动,而晶间断裂是主要的断裂机理。抗拉强度σ b,屈服强度σ小号和伸长δ在2219个工件的径向方向上增加至491兆帕,388兆帕,和13.1%,其中,分别为11%,14%,和68%的增加, 。在均匀性σ bσ小号和2219个工件的δ分别增加了57%,38%和64%。

更新日期:2020-03-16
down
wechat
bug