Flow Stress Modelling and 3D Processing Maps of Al4.5Zn4.5Mg1Cu0.12Zr Alloy with Different Scandium Contents

Applied Sciences

AlexanderYu. Churyumov¹  MariaV. Glavatskikh¹  RuslanYu. Barkov¹  AndreyV. Pozdniakov¹  MaximG. Khomutov¹  AlexeyN. Solonin¹ 

[1] Department of Physical Metallurgy of Non-Ferrous Metals, National University of Science and Technology “MISiS”, Leninsky Prospekt 4, 119049 Moscow, Russia;

关键词: hot deformation behaviour;    flow stress;    3D processing map;    aluminium alloys;    Al₃(Sc,Zr);   

DOI  :  10.3390/app11104587

来源: DOAJ

【 摘 要 】

The hot deformation behaviour of an Al4.5Zn4.5Mg1Cu0.12Zr based alloy with 0.05, 0.1 and 0.15% Sc was investigated at temperatures between 300–450 °C and a strain rate of 0.1–15 s⁻¹. The materials constants of a flow stress model based on the Zener-Hollomon parameter were determined (AARE was 5.8%). Three-dimensional processing maps were established by combining power dissipation efficiency and flow stability diagrams. Based on processing maps analysis and microstructures investigations, the optimal deformation parameters were determined as a temperature range of 350–400 °C and strain rates of 0.1–1 s⁻¹ for the alloys with 0.05% and 0.1% Sc, and 0.1 s⁻¹ for the alloy with 0.15% Sc.

【 授权许可】

Unknown