Homogenization of an al-mg alloy and alligatoring failure: alloy ductility and fracture
Abstract
High-strength Al-Mg alloys have a propensity toward hot fracture and failure by alligatoring during hot rolling. In this study the effect of homogenization conditions on the susceptibility of an Al-5.1Mg-0.7Mn alloy toward alligatoring was investigated. It was found that the plates homogenized in a temperature range of 460-520 degrees C were prone toward alligatoring, but once homogenized at 550 degrees C they were not prone toward it any longer. The characterization of the fracture showed a predominance of the intergranular ductile fracture, but the type of the constitutive particles filling the voids changed with the homogenization regime. Grain decohesion and grain-boundary embrittlement show that certain thermal treatments resulted in a microstructure that promoted slip localization.
Keywords:
Al-Mg alloy / thermo-mechanical processing / hot working / ductility / embrittlementSource:
Materiali in Tehnologije, 2016, 50, 3, 403-407Publisher:
- Inst Za Kovinske Materiale I In Tehnologie, Ljubjana
Funding / projects:
- Ministry of Education, Science and Technological Development, Republic of Serbia
- info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/34018/RS// (RS-34018)
DOI: 10.17222/mit.2015.110
ISSN: 1580-2949