Effects of pre-stretching on microstructure and properties of WE43A-alloy after aging treatment. Issue 12 (13th August 2019)

• Record Type: Journal Article
• Authors: Sun, Qing Ya; Wang, Li Ping; Liu, Dong Rong
• Is Part Of: Materials science and technology. Volume 35:Issue 12(2019)
• Page Start: 1448
• Page End: 1456
• Publication Date: 2019-08-13
• Subjects: WE43A alloy -- pre-stretching deformation -- microstructure -- mechanical properties -- honeycomb network; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2019.1629528
• Languages: English
• ISSNs: 0267-0836

Abstract

ABSTRACT: Effects of pre-stretching on microstructure and mechanical properties of WE43A alloy were investigated by optical microscope, transmission electron microscope, scanning electron microscopy and electronic universal material testing machine. The experimental results showed that a large number of dislocations and twins were formed in the matrix with the increase of deformation strain. During subsequent aging, β1 phases precipitated in dislocation area and distributed in matrix in a combined manner, honeycomb network and random. The precipitation of β1 increased the ultimate tensile strength and yield strength of WE43A alloy to 272 and 241 MPa, in comparison with the samples without pre-stretching (226 and 180 MPa). The fracture morphology of sample with strain 9% was transgranular cleavage fracture.