Pan American Materials Congress: Materials for Transportation and Lightweighting: Aluminum Processing
Sponsored by: Third Pan American Materials Congress Organizing Committee
Program Organizers: Mary Wells, University of Waterloo; Rafael Colás, Universidad Autónoma de Nuevo León; Fernand Marquis, San Diego State University; Ramalinga Viswanathan Mangalaraja, University of Concepcion; Marta Lopez, University of Concepcion; Elvi Dalgaard, Pratt & Whitney Canada; Patricia Zambrano, Universidad Autonoma de Nuevo Leon

Wednesday 3:40 PM
March 1, 2017
Room: Marina D
Location: Marriott Marquis Hotel

Session Chair: Fernand Marquis, San Diego State University

3:40 PM Introductory Comments

3:45 PM  
The Role of Light Weight Materials in Energy Efficiency in the Transportation Industry: Fernand Marquis1; 1San Diego State University
    The transportation industry used 55% of the oil worldwide in 2006, and mobility projections show that it is expected to triple by 2050 with associated energy use. Its global use of lightweight materials reached 68.5 million tons in 2011. The aircraft industry was the first to introduce aluminum alloys in a widespread basis in 1920s, followed by the introduction of composite materials. This trend was then adopted by the automobile industry in the 1990s and later by the shipbuilding industry. The approach of reducing weight by downsizing in order to meet stringent fuel consumption requirements, yet meeting safety standards and consumer preferences is now being followed by other alternatives. One of these is the development of strong, tough, stiff, environmental friendly, cost effective, reliable and light-weight materials, using a system design approach. A significant number of nano, nanostructured and nano hybrid materials systems have also been deployed.

4:05 PM  
Current Lightweight Design Trends in Mobile IT Products: Mesut Varlioglu1; Chalam Kashyap1; Jack Hui He1; 1HP Inc.
    Lighter, thinner, stronger and cost effective design with multiple finish capability is a constant effort in mobile IT Products (tablets, premium notebooks and smart phones). To further reduce weight, aluminum, magnesium alloys, plastics and carbon fiber composites are commonly used in enclosures due to their light weight, ability to be formed into various shapes and suitability to be coated with several finishing processes. This presentation will discuss the common trends, opportunities and challenges in manufacturing mobile IT products using these lightweight materials. The presentation will also show the life cycle assessment of the lightweight materials to ensure the ecologically sustainable products.

4:25 PM  Cancelled
Effect of the Thermal Processing History on the Age Hardening Behaviour of 7000 Series Aluminum Alloys: Atekeh Abolhasani1; Tirdad Niknejad1; Kaab Omer1; Shahrzad Esmaeili1; Mary Wells1; Michael Worswick1; 1University of Waterloo
    The effect of the thermal treatment history on the age hardening behaviour of 7000 series aluminum alloys is studied using experimental and modelling techniques. Isothermal and differential scanning calorimetry techniques are used to analyze the precipitation behaviour during sequential heat treatment steps. It is found that the initial aging steps at low temperatures have profound effects on the kinetics of precipitation hardening during artificial aging processes. The hardening behaviour is further analyzed by implementing a previously-developed modelling technique in order to provide a pathway towards the optimization of the age hardening characteristics for future automotive applications of these alloys.

4:45 PM  
Microstructures, Precipitation Sequence, and Hardening of Al-Mg-Zn Alloys with High Mg:Zn Ratio: Yangyang Fan1; Diran Apelian1; 1Worcester Polytechnic Institute
    Al-11Mg-2.4Zn alloy has a eutectic reaction: L→Al +T+β at temperature of 445°C. After solutionization at 435 °C, the eutectic T and β phases are mostly dissolved in aluminum matrix. The subsequent aging of the alloy at the temperature between 160 °C to 200 °C leads to the precipitation of T”, T’, and β’. The precipitation sequence is discovered to be: SSS → GP zone → T”→ clustered T”→ phase T’ phase; β’ precipitates are found to be coexisting with T’ phases when aging temperature is above 200°C. When specimens are aged at 160 °C for 12 hours, the optimized tensile properties was obtained, and microstructure analysis shows that a large amount of 5~30 nm in radius, full coherent L12 crystal structure T” precipitates are homogenously distributed in the grains and as well as in the grain boundaries.

5:05 PM  
Metallurgical Bond Formation During Multimaterial Metal Casting: Carl Soderhjelm1; Diran Apelian1; 1Worcester Polytechnic Institute
    Cast-in ferrous inserts in aluminum castings can be a powerful tool to locally improve properties such as wear resistance, corrosion resistance, heat transfer and strength. The interaction between the two metals can result in two distinct types of bonding, a mechanical bond interlocking the two metals and a metallurgical bond. A continuous metallurgical bond could have the potential to improve load and heat transfer across the boundary between the steel and the aluminum. The formation of a continuous reaction layer between the ferrous insert and the aluminum alloy is a diffusion process which requires both energy and time to grow. To practically apply this technology a better understanding and quantification of the conditions necessary for the formation of a continuous metallurgical bond and is the focus of this work. Results will be presented and discussed.

5:25 PM  
Synthesis of Energetic Composites in Ti-Al-B-C System by Adiabatic Explosive Compaction: Mikheil Chikhradze1; Fernand Marquis2; 1G.Tsulukidze Mining Institute/ F.Tavadze Institute of Metallurgy and Materials Science/Georgian Technical University; 2San Diego State University
    Recent developments in materials science have increased the interest towards the bulk (energetic/energy) materials and the technologies for their production. The unique properties which are typical for the composites fabricated in Ti-Al-B-C systems makes them very attractive for aerospace, power engineering, machine and chemical applications. In addition, aluminum matrix composites (AMCs) have great potential as structural materials due to their excellent physical, mechanical and tribological properties. Because of good combinations of thermal conductivity and dimensional stability AMCs are found to be also potential materials for electronic packaging/application. The methodology/technology for the fabrication of bulk materials from ultrafine-grained powders of Ti-Al-B-C system are described in this paper. It includes results of theoretical and experimental investigation for selection of powder compositions, determination of thermodynamic conditions for blend preparation and optimal technological parameters for mechanical alloying and adiabatic compaction. For consolidation of mixtures the explosive compaction technology was applied at room temperatures.