Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 214, Issue 8, Pages 1665-1672Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2014.03.010
Keywords
Ultrasonic consolidation; Bond strength; Aluminum; Infrared thermography
Funding
- Army Research Laboratory under Cooperative Agreement [W911NF-06-2-011]
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A process model was developed that couples the effects of the three adjustable ultrasonic consolidation (UC) process parameters (amplitude, force and speed) into a single term - thermal weld energy due to frictional and volumetric heat generation. Infrared thermography was used to evaluate weld energy during UC and a relationship was established between weld energy and the peel strength of ultrasonically consolidated aluminum. An optimum processing widow was identified for bonding Al 1100-0 and Al 3003-H14 based on UC processing temperature and weld time. Bonding occurred well below the material melting temperatures, confirming that thermal softening in the bulk of the material or melting are not the bonding mechanisms and that bonding takes place in the solid-state. (C) 2014 Elsevier B.V. All rights reserved.
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