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Optimization of the shear strengths of ultrasonically consolidated Ti/Al 3003 dual-material structures |
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| Authors: | JO ObielodanBE Stucker E MartinezJL Martinez DH HernandezDARamirez LE Murr |
| Affiliation: | a Mechanical and Aerospace Engineering Department, Utah State University, Logan, UT 84322-4230, USA b Industrial Engineering Department, University of Louisville, Louisville, KY 40292, USA c Metallurgical and Materials Engineering Department, University of Texas at El Paso, El Paso, TX 79968, USA |
| Abstract: | The interfacial bonding between layers in ultrasonically consolidated structures is poor for some material combinations, resulting in relatively low bond strength. This makes resultant parts unsuitable for structural applications. This work discusses a study of the effects of post process heat treatment of ultrasonically consolidated commercially pure titanium and aluminum alloy 3003 dual-material systems. The lap shear strengths of as-consolidated specimens as well as heat treated ones were tested. The results show that there is significant improvement of the strengths of post processed specimens over the as-consolidated ones. The improvement is as a result of stress relieving of the strain hardened interface between the two materials and some interactions of the base materials across the interfacial boundaries at elevated temperatures, leading to stronger bonds. The study highlights the role of post process heat treatments for improving the mechanical properties of ultrasonically consolidated structures. |
| Keywords: | Ultrasonic consolidation Additive manufacturing Titanium Aluminum Dual-materials Heat treatment Lap shear strength Micro-hardness Interfacial bonding |
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