Structure, strength and superplasticity of the bulk 1570C alloy subjected to high-temperature multidirectional isothermal forging

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Sitdikov, O.S.^1 ; Avtokratova, E.V.^1 ; Ilyuasov, R.R.^1 ; Latypova, O.E.^1 ; Markushev, M.V.^1

Institute for Metals Superplasticity Problems, Russian Academy of Sciences, 39 Khalturin st., Ufa

450001, Russia^1

关键词: Age-hardenable;    Alloy hardening;    Fine-grained structure;    High temperature;    Isothermal forging;    Multidirectional forging;    Superplastic properties;    Temperature intervals;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012026/pdf
DOI  :  10.1088/1757-899X/447/1/012026

来源: IOP

【 摘 要 】

The structure and mechanical properties of the cast non-age-hardenable complex-alloyed 1570C alloy (Al-5Mg-0.18Mn-0.2Sc-0.08Zr, wt%) were studied after multi-directional isothermal forging at 325 °C up to accumulative strain e ≈ 12 and subsequent annealing in the temperature interval from 325 to 500 °C. It is shown that even amid the absence of substantial alloy hardening, high-temperature multi-directional forging is an effective method for processing bulk billets, resulting in a stable and homogeneous (ultra)fine-grained structure with a grain size of about 2 mm, which provided improved ductility and extraordinary high superplastic properties.