Investigation of deformation behavior and strain-induced precipitations in Al-Zn-Mg-Cu alloys across a wide temperature range

被引：5

作者：

Zhang, Qingdong ^{[1
,2
,3
]}

Zuo, Jinrong ^{[1
,2
,3
]}

Yang, Chen ^{[1
,2
,3
]}

Xia, Yingxiang ^{[1
,2
]}

Shu, Xuedao ^{[1
,2
]}

Mei, Bizhou ^{[4
]}

Wang, Ying ^{[1
,2
]}

Cui, Long ^{[5
]}

机构：

[1] Ningbo Univ, Fac Mech Engn & Mech, Ningbo 315211, Peoples R China

[2] Zhejiang Prov Key Lab Part Rolling Technol, Ningbo 315211, Peoples R China

[3] Ningbo Engn Res Ctr Intelligent Die Casting New En, Ningbo 315211, Peoples R China

[4] Zhejiang Yiduan Precis Machinery Co Ltd, Ningbo 315100, Peoples R China

[5] Ningbo Junling Mold Technol Co Ltd, Ningbo 315800, Peoples R China

来源：

SCIENTIFIC REPORTS | 2024年 / 14卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Al-Zn-Mg-Cu alloy; Arrhenius constitutive model; Hot deformation; Strain-induced precipitation; Microstructure; 7055; ALUMINUM-ALLOY; HOT DEFORMATION; DYNAMIC RECRYSTALLIZATION; CONSTITUTIVE MODEL; GRAIN-REFINEMENT; PROCESSING MAP; FLOW BEHAVIOR; COMPRESSION; MECHANISM; WORKABILITY;

D O I：

10.1038/s41598-024-65669-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

This study explores the hot deformation behavior of Al-Zn-Mg-Cu alloy through uniaxial hot compression (200 degrees C-450 degrees C) using the Gleeble-1500. True stress-strain curves were corrected, and three models were established: the Arrhenius model, strain compensated (SC) Arrhenius model, and strain compensated recrystallization temperature (RT) segmentation-based (TS-SC) Arrhenius model. Comparative analysis revealed the limited predictive accuracy of the SC Arrhenius model, with a 25.12% average absolute relative error (AARE), while the TS-SC Arrhenius model exhibited a significantly improved to 9.901% AARE. Material parameter calculations displayed variations across the temperature range. The SC Arrhenius model, utilizing an average slope method for parameter computation, failed to consider temperature-induced disparities, limiting its predictive capability. Hot processing map, utilizing the Murty improved Dynamic Materials Model (DMM), indicated optimal conditions for stable forming of the Al-Zn-Mg-Cu alloy. Microstructural analysis revealed MgZn2 precipitation induced by hot deformation, with crystallographic defects enhancing nucleation rates and precipitate refinement.

引用

页数：22

共 50 条

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