Enhanced mechanical properties of Ti6Al4V alloy fabricated by laser additive manufacturing under static magnetic field. Issue 8 (3rd August 2022)

• Record Type: Journal Article
• Authors: Zhao, Ruixin; Chen, Chaoyue; Shuai, Sansan; Hu, Tao; Fautrelle, Yves; Liao, Hanlin; Lu, Jian; Wang, Jiang; Ren, Zhongming
• Is Part Of: Materials research letters. Volume 10:Issue 8(2022)
• Page Start: 530
• Page End: 538
• Publication Date: 2022-08-03
• Subjects: Laser deposition -- titanium alloys -- magnetic field -- texture; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2022.2064195
• Languages: English
• ISSNs: 2166-3831

Abstract

Abstract : This study introduced a novel magnetic-field regulation method in metallic additive manufacturing to achieve the refined grain structure and enhanced mechanical properties without post-treatment and composition changes. As a showcase material, the Ti6Al4V alloy was fabricated using direct energy deposition under the static magnetic field (SMF). It is found that the transverse SMF of 0.55 T can effectively regulate the microstructure with twisted prior-β grains (strong <001> orientation to weak <110> orientation) and discontinuous α grain boundaries. The tensile test shows a significant improvement of tensile elongation ( ε f ) in both longitudinal and transverse directions with a slight strength decrease. GRAPHICAL ABSTRACT: UF0001 IMPACT STATEMENT: A magnetic field assisting laser additive manufacturing approach was developed to modulate the microstructure for Ti-6Al-4V alloy. The resulting refined β grains and discontinuous α grain boundaries (GBs) improve the ε f significantly.