Influence of cryogenic thermal treatment on mechanical properties of an Al–Cu–Mg alloy. Issue 4 (4th March 2018)

• Record Type: Journal Article
• Authors: Araghchi, M.; Mansouri, H.; Vafaei, R.
• Is Part Of: Materials science and technology. Volume 34:Issue 4(2018)
• Page Start: 468
• Page End: 472
• Publication Date: 2018-03-04
• Subjects: Al–Cu–Mg alloy -- cryogenic thermal treatment -- mechanical properties -- TEM evaluations; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2017.1407553
• Languages: English
• ISSNs: 0267-0836

Abstract

ABSTRACT: In this study, a cryogenic thermal treatment is developed and its effects on mechanical properties and precipitates are investigated. Water-quenched samples were immersed in liquid nitrogen and reheated in hot oil at 180°C or boiling water for 5 min. Finally, the samples were artificially aged at 190°C for 12 h. The results indicated a notable increase of about 75 MPa in the ultimate tensile strength in comparison to T6 heat-treated alloy. TEM observations revealed that the S(S′) precipitates were fine and uniformly distributed in the microstructure due to reheating in hot oil and subsequent aging treatment.