Bimorphic microstructure in Ti-6Al-4V alloy manipulated by spark plasma sintering and in-situ press forging. (1st March 2021)

• Record Type: Journal Article
• Authors: Kang, L.M.; Cai, Y.J.; Luo, X.C.; Li, Z.J.; Liu, X.B.; Wang, Z.; Li, Y.Y.; Yang, C.
• Is Part Of: Scripta materialia. Number 193(2021)
• Page Start: 43
• Page End: 48
• Publication Date: 2021-03-01
• Subjects: Titanium alloys -- Spark plasma sintering -- Forging -- Microstructure -- Mechanical properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.10.035
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We report on a methodology of powder sintering and in-situ press forging, which can be used to manipulate a new bimorphic microstructure in Ti-6Al-4V alloy. The microstructure contains typical triangle colonies with ultrafine lamellar α and β, and their border areas with ultrafine equiaxed α, dispersed nano/ultrafine β, as well as α/β interface L layers. Surprisingly, the bimorphic alloy exhibits excellent mechanical properties under both tensile and compressive conditions, far superior to other Ti-6Al-4V alloys and their composites reported so far. Therefore, this innovative methodology provides a simple and economical method for preparing high-performance metallic alloys in structural applications. Graphical abstract: We report on an innovative methodology of spark plasma sintering and in-situ press forging, which can be used to manipulate a new bimorphic microstructure in Ti-6Al-4V alloy. Surprisingly, the manipulated bimorphic alloy exhibits excellent mechanical properties under both tensile and compressive conditions, far superior to other Ti-6Al-4V alloys and their composites reported so far. Image, graphical abstract