Application of bulk deformation methods for microstructural and material property improvement and residual stress and distortion control in additively manufactured components. (1st July 2017)

• Record Type: Journal Article
• Authors: Colegrove, Paul A.; Donoghue, Jack; Martina, Filomeno; Gu, Jianglong; Prangnell, Philip; Hönnige, Jan
• Is Part Of: Scripta materialia. Number 135(2017)
• Page Start: 111
• Page End: 118
• Publication Date: 2017-07-01
• Subjects: Titanium -- Additive manufacture -- Microstructure -- Residual stress -- Distortion; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.10.031
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Many additively manufactured (AM) materials have properties that are inferior to their wrought counterparts, which impedes industrial implementation of the technology. Bulk deformation methods, such as rolling, applied in-process during AM can provide significant benefits including reducing residual stresses and distortion, and grain refinement. The latter is particularly beneficial for titanium alloys where the normally seen large prior β grains are converted to a fine equiaxed structure – giving isotropic mechanical properties that can be better than the wrought material. The technique is also beneficial for aluminium alloys where it enables a dramatic reduction in porosity and improved ductility.