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

Author:

Zhang Qingdong,Zuo Jinrong,Yang Chen,Xia Yingxiang,Shu Xuedao,Mei Bizhou,Wang Ying,Cui Long

Abstract

AbstractThis study explores the hot deformation behavior of Al–Zn–Mg–Cu alloy through uniaxial hot compression (200 °C–450°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.

Funder

Research Project of Zhejiang Provincial Department of Education

the Zhejiang Xinmiao Talent Program

China Innovation Challenge (Ningbo) Major Project

Ningbo Science and Technology Major Project

Key core technology research project of Jiangbei District

the Scientific Research Foundation of Graduate School of Ningbo University

National Natural Science Foundation of China

Publisher

Springer Science and Business Media LLC

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