A Novel Method for Densification of Titanium Using Hydrogenation-Induced Expansion under Constrained Conditions. (15th March 2022)

• Record Type: Journal Article
• Authors: Zhou, Chengshang; Lin, Fangrui; Sun, Pei; Chen, Zoujun; Duan, Zhongyuan; Zhu, Xianzhi; Liu, Yong; Fang, Zhigang Zak
• Is Part Of: Scripta materialia. Number 210(2022)
• Publication Date: 2022-03-15
• Subjects: Hydrogenation -- Titanium -- Powder metallurgy -- Densification; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.114432
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Full density of sintered Ti alloys is difficult to achieve through conventional pressureless sintering techniques. This paper introduces a novel approach for densifying powder metallurgy Ti alloys through constrained hydrogenation assisted densification (CHAD). This method utilizes hydrogenation-induced volumetric expansion and constrains a sintered Ti body in a rigid mold to achieve densification. The results demonstrate that the residual porosity in powder metallurgy CP-Ti and Ti-6Al-4V alloys can be effectively reduced or removed by CHAD, leading to improved tensile properties. The described method can be used as an efficient and cost-effective technique to make Ti and Ti alloys with high density and improved mechanical properties. Graphical Abstract: Image, graphical abstract