Enhanced hot deformation property of Al 2 O 3 /Cu - Cr composite fabricated by internal oxidation

被引：3

作者：

Xu, Guoyang ^{[1
]}

Guo, Xiuhua ^{[1
]}

Li, Shaolin ^{[1
]}

Song, Kexing ^{[2
]}

Song, Hao ^{[1
]}

Su, Hui ^{[1
]}

机构：

[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Henan Key Lab Nonferrous Mat Sci & Proc Technol, Luoyang 471023, Peoples R China

[2] Henan Acad Sci, Henan Key Lab Adv Cond Mat, Zhengzhou 450046, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 899卷

基金：

中国博士后科学基金;

关键词：

Copper matrix composites; Hot deformation; Constitutive model; Dynamic recrystallization; Hot processing map; MICROSTRUCTURE; BEHAVIOR; ALLOY; INTERFACE; EVOLUTION; STRESS; NANO;

D O I：

10.1016/j.msea.2024.146463

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The plastic deformability of ODS copper (Al 2 O 3 /Cu composite) always limits its widespread commercial application. In this work, the thermodynamically metastable mono -phase CuCr alloy was used to fabricate 2.5 vol% Al 2 O 3 /Cu-0.3 vol%Cr by an internal oxidation method with a subsequent solution treatment to improve the plastic deformation ability. The influence of dissolved Cr on the hot deformation property and dynamic recrystallization (DRX) behavior of Al 2 O 3 /Cu composite was studied, and the softening mechanism of Al 2 O 3 / Cu - Cr composite was revealed. The results show that the solid solution of Cr at high temperature can significantly improve the hot deformability of Al 2 O 3 /Cu composite. The maximum reduction of peak stress of 2.5 vol% Al 2 O 3 /Cu-0.3 vol%Cr composite is 57 % lower than that of 2.8 vol% Al 2 O 3 /Cu composite. Furthermore, the DRX critical values of 2.5 vol%Al 2 O 3 /Cu-0.3 vol%Cr composite is lower than that of 2.8 vol% Al 2 O 3 /Cu composite, and the DRX occurs earlier in Al 2 O 3 /Cu - Cr composite. The strain -compensated constructive model of Al 2 O 3 / Cu - Cr composite was established with a relation coefficient (R 2 ) of 0.92, which proves the accuracy of the model. Finally, the hot processing map of Al 2 O 3 /Cu - Cr composite was constructed based on a dynamic analysis model, and the appropriate hot processing parameter of Al 2 O 3 /Cu - Cr composite was obtained with temperature of 1205 K - 1223 K and strain rate of 0.022 s -1 -0.97 s -1 . The results are beneficial to improve hot deformation property of Al 2 O 3 /Cu - Cr composite and large sized bulks fabrication.

引用

页数：14