摘要
提出一种高性能5083铝合金板材的制备工艺。该工艺为温热条件下基于循环应力状态进行的反复模压-扭转强变形过程。研究表明:当温度为200℃时,二次变形后晶粒细化效果最好,平均晶粒尺寸从24μm细化到12.5μm;当温度为300℃时,一次变形后板材的力学性能最好。抗拉强度(397 MPa)和断裂伸长率(28.3%)分别比原板提高30%和60%。第二相粒子和再结晶晶粒通过第二相强化和细晶粒强化来提高材料的强度。等轴再结晶晶粒则提高了材料的塑性和韧性。
A preparation process of high performance 5083 aluminum alloy sheet was proposed.The process is severe plastic deformation process of alternate ring-groove pressing and torsion based on cyclic stress state under warm conditions.The results show that when the temperature is 200°C,the grain refinement effect after secondary deformation is the best,and the average grain size is refined from 24 to 12.5μm.When the temperature is 300°C,the mechanical properties of the sheet after one deformation are the best.Compared with those of the original sheet,the tensile strength(397 MPa)and breaking elongation(28.3%)are increased by 30%and 60%,respectively.The second phase particles and recrystallized grains improve the strength of the material by second phase strengthening and fine grain strengthening.The equiaxed recrystallized grains improve the plasticity and toughness of the material.
作者
顾勇飞
刘卫鹏
郭昊山
张春祥
骆俊廷
Yong-fei GU;Wei-peng LIU;Hao-shan GUO;Chun-xiang ZHANG;Jun-ting LUO(Key Laboratory of Advanced Forging and Stamping Technology and Science,Ministry of Education,Yanshan University,Qinhuangdao 066004,China;State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China)
基金
financially supported by the Natural Science Foundation of Hebei Province,China(No.E2019203005)。
关键词
5083铝合金
环波反复模压和扭转工艺
循环应力状态
力学性能
5083 aluminum alloy
alternate ring-groove pressing and torsion
cyclic stress state
mechanical properties
作者简介
Corresponding author:Jun-ting LUO,E-mail:luojunting@ysu.edu.cn。
