Influence of hot isostatic pressing on the performance of aluminum alloy fabricated by ultrasonic additive manufacturing

SCRIPTA MATERIALIA

卷:145

Article

Gussev, M. N.¹  Sridharan, N.^1,2  Thompson, Z.¹  Terrani, K. A.¹  Babu, S. S.^1,2 

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Knoxville, TN 37916 USA

关键词: Ultrasonic additive manufacturing;    Hot isostatic pressing;    Electron back scatter diffraction;    Tensile tests;   

DOI  :  10.1016/j.scriptamat.2017.10.004

来源: Elsevier

【 摘 要 】

Ultrasonic additive manufacturing (UAM) is a solid-state manufacturing technique employing principles of ultrasonic welding coupled with mechanized tape layering to fabricate fully functional parts. However, UAM-fabricated parts often exhibit a reduction in strength when loaded normal to the welding interfaces (Z-direction). Here, the effect of hot isostatic pressing (HIP) on UAM builds of aluminum alloy was explored. Tensile testing and microstructure characterization were conducted; it was established that HIP eliminated the brittle Z-direction fracture and improved the strength and ductility of the Z-direction specimens. HIP eliminated voids and produced recrystallized structure; however, welding interfaces survived the HIP treatment (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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