微量元素对采用挤压工艺的Al-Zn-Cu基合金热性能和力学性能的影响
Effects of Trace Elements on Thermal and Mechanical Properties of Al-Zn-Cu Based Alloys Using Extrusion.
作者信息
Kim Yong-Ho, Yoo Hyo-Sang, Son Hyeon-Taek
机构信息
EV Components & Materials Group, Korea Institute of Industrial Technology, 1110-9 Oryong-dong, Buk-gu, Gwangju 61012, Republic of Korea.
出版信息
J Nanosci Nanotechnol. 2020 Jul 1;20(7):4216-4220. doi: 10.1166/jnn.2020.17543.
Thermal properties and microstructure of Al-4 wt.% Zn-2 wt.% Cu- ( = 2 wt%. Mg, 2 wt%. Sn, 0.7 wt.% Mg-0.7 wt.% Sn-0.7 wt.% Ca) alloys on cast and extrusion have been investigated with extrusion temperature of 400 °C. Al-4 wt.% Zn-2 wt.% Cu alloy was composed of Al and Al₂Cu phases. By adding Mg contents, Al₂Mg₃Zn₃ phase was increased and Al₂Cu phase was decreased respectively. During hot extrusion, elongated in the extrusion direction because of severe deformation. The thermal conductivity with temperature and composition of as-extruded Al-4 wt.% Zn-2 wt.% Cu- alloys decreases with adding 2 wt.% Mg, 2 wt.% Sn contents from 190.925 and 196.451 W/mK but thermal properties of addition of 0.7 wt.% Mg-0.7 wt.% Sn-0.7 wt.% Ca element slightly reduced from 222.32 to 180.775 W/mK. The ultimate tensile strength (UTS) for Al-4 wt.% Zn- 2 wt.% Cu alloy was 121.67 MPa. By adding 2 wt.% Mg contents, tensile strength was dramatically increased with 350.5 MPa.
研究了铸造和挤压态下Al-4 wt.% Zn-2 wt.% Cu-( = 2 wt%. Mg, 2 wt%. Sn, 0.7 wt.% Mg-0.7 wt.% Sn-0.7 wt.% Ca)合金在400 °C挤压温度时的热性能和微观结构。Al-4 wt.% Zn-2 wt.% Cu合金由Al和Al₂Cu相组成。通过添加Mg含量，Al₂Mg₃Zn₃相分别增加而Al₂Cu相减少。在热挤压过程中，由于严重变形而沿挤压方向伸长。挤压态Al-4 wt.% Zn-2 wt.% Cu-合金的热导率随温度和成分变化，添加2 wt.% Mg、2 wt.% Sn含量时，热导率从190.925和196.451 W/mK下降，但添加0.7 wt.% Mg-0.7 wt.% Sn-0.7 wt.% Ca元素时热性能从222.32 W/mK略微降低至180.775 W/mK。Al-4 wt.% Zn- 2 wt.% Cu合金的极限抗拉强度（UTS）为121.67 MPa。添加2 wt.% Mg含量时，抗拉强度大幅提高至350.5 MPa。
Zotero 插件