Aluminum Alloys, Processing and Characterization: Alloy and MMC Development
Sponsored by: TMS Light Metals Division, TMS: Aluminum Committee
Program Organizers: Andre Phillion, McMaster University; Dmitry Eskin, Brunel University
Monday 2:00 PM
February 28, 2022
Room: 208B
Location: Anaheim Convention Center
Session Chair: Dmitry Eskin, Brunel University
2:00 PM Introductory Comments
2:05 PM
Development of Advanced Aluminum Alloy for Structural Castings: Randy Beals1; Xiaoping Niu1; Zach Brown1; 1Magna International
In recent years, demands for increased lightweight performance and lowered fuel consumption in automobile body in white structures have been growing. Cosma, the body and chassis group of Magna International, initiated a research program dedicated to developing an optimized low-cost aluminum alloy for structural high pressure vacuum die cast automotive components. For most high vacuum die cast applications, the mechanical properties are one of the most important requirements. Ductile properties are specified to ensure crash behavior and rivetability for joining purposes. This research program is comprised of both theoretical and experimental elements to arrive at a self-hardening Aural 5M (modified) alloying system that satisfies the desired mechanical properties in as-cast (F-temper) condition. In addition, for manufacturability of the next generation of ultra large body castings, new aluminum alloys are also required to exhibit enhanced castability. This paper discusses the improved properties and manufacturability of Magna’s new Aural 5M alloy.
2:30 PM
Interplay between Cooling Rate, Microstructure, and Mechanical Properties of an Al-Ce-Ni-Mn Alloy: Jordan Kozakevich1; Joshua Stroh2; Victor Mallouhi1; Dimitry Sediako1; David Weiss2; 1HPPM Laboratories, UBCO; 2Eck Industries
Aluminum-cerium (Al-Ce) and Al-Ce-manganese (Al-Ce-Mn) alloys have been researched with respect to the automotive and aerospace industry providing successful results for a new generation of alloys. These alloys show promise for elevated temperature applications with improved mechanical retention above 200°C. Additions of nickel (Ni) to different Al alloys also shows promising results for elevated temperature strength, but little research has been done on the Al-Ce-Ni-Mn system. To further characterize this alloy system, this paper focuses on an Al11.3Ce3.2Ni1.2Mn alloy. The alloy was cast in a steel wedge mold to replicate different cooling rates. Optical and SEM/EDS microscopy were used for SDAS measurements and identifying the phases present at different cooling rates throughout the casting. Correlating the metallography resulting to solidification rates and elevated-temperature mechanical property retention will further characterize the Al-Ce-Ni-Mn system. In turn, this will help the automotive industry in developing Al-based alloys for high performance powertrain applications.
2:55 PM
NOW ON-DEMAND ONLY - Influence of Tungsten Nanoparticles on the Structure and Mechanical Behavior of AA5056 under Quasi-static Loading: Nikolai Kakhidze1; Anastasia Akhmadieva1; Anton Khrustalyov1; Ilya Zhukov1; Alexander Vorozhtsov1; 1National Research Tomsk State University
Solid nanoparticles present in a metal can become an obstacle to the movement of dislocations. To obtain the alloys under study, 0.5 wt% of tungsten nanoparticles with mechanical stirring. The alloys were obtained by casting in a steel chill mold with vibration treatment until complete solidification. Tensile tests were carried out on an Instron 3369 machine with a moving crosshead speed of 0.2 mm / min. It was found that for an alloy with tungsten nanoparticles, the values of the yield stress increase from 52.5 to 79.4 MPa, the ultimate tensile strength from 140 to 155.4 MPa, and the values of maximum deformations from 1.9 to 5.5%.This work has been supported by the grants the Russian Science Foundation, RSF 20–79–00060. The research was done using equipment of Tomsk Regional Core Shared Research Facilities Center of National Research Tomsk State University
3:20 PM Break
3:35 PM
On the Influence of Alloy Composition and Sn Micro-alloying on Mechanical Properties and Corrosion Resistance of EN-AW 6056: Axel Marquardt1; Ines Zerbin1; Peer Decker1; Peter Baumgart2; Luisa Marzoli1; Marcel Rosefort1; 1TRIMET Aluminium SE; 2IBPB Engineering Services
Novel applications of lightweight alloys in various fields (e.g. automotive, aerospace) demand for even enhanced materials characteristics like improved mechanical properties and higher resistance against corrosion. Apart from modifying the alloy’s composition within specified limits, micro-alloying is a valuable tool to aim for improved mechanical properties and/or corrosion resistance. This study puts light on how altering the alloy’s composition and/or micro-alloying using Sn changes the mechanical properties and corrosion behavior. Three different alloying compositions of EN-AW 6056 (standard, high alloying element concentration and, 0.025 wt.-% Sn addition) were tested. The influence of composition on mechanical properties and corrosion resistance were then evaluated.
4:00 PM
NOW ON-DEMAND ONLY - Effect of Alloying Elements on Strength Properties and Casting Properties of Corrosion Resistant Quench-free Al-Ca Alloys: Dmitry Fokin1; Sergey Matveev1; Roman Vakhromov1; Aleksandr Alabin2; 1Light Materials and Technologies Institute UC RUSAL; 2JSC RUSAL Management
The Al-Si alloying system is widely used for the most common aluminum casting alloys. However, there is strong demand for new types of casting alloys that can face increased requirements to the material performance especially in an as-casted condition. The Al-Ca alloying system has good perspectives due to the possibility of obtaining dispersed eutectic (Al) + Al4Ca in the cast state without modification and heat treatment. The investigation of Al-Ca alloys with different Ca content, as well as the influence of various alloying elements, such as Zn, Si, Fe, Mg, is necessary for the development of industrial alloys compositions. The authors investigated the effect of the content of Ca and other alloying elements on the structure, technological and strength properties of the Al-Ca alloy during high-pressure casting. It also shows the possibility of increasing the strength properties of the alloy due to the formation of ternary eutectics in the alloy.
4:25 PM
Effect of Bi Alloying Element Addition on Microstructural Change in Al-Mg-Si Alloys: Zeynep Tutku Özen1; Osman Halil Çelik1; Mehmet Bugra Guner1; İlyas Artunç Sarı1; Abdullah Kınacı1; 1Asas Aluminium
Billet form solid aluminum into extrusion die in pieces with force of the ram and then welding of aluminum to form hollow profile as solid diffusion process. In this study, the effects of the addition of bismuth element, which is found in liquid form during the aluminum extrusion temperature to 6082 aluminum alloy, which is highly used in railway industry on billet microstructure and mechanical properties of the alloy, were investigated. 355 mm / 14 inches diameter 6082 aluminum alloy billets bismuth included produced with direct chill casting method. Casting speed and cooling water flowrate parameters were studied in casting operation. After casting, in order to stabilize the billet microstructure, homogenization thermal treatment done at 530 ° C for 6 hours. Microstructure of the billet was characterized with an optical microscope, SEM and EDS. Tensile test specimen produced from billet samples and mechanical properties determined according to 6892-1.
4:50 PM
Effect of TiC Nanoparticles on Solidification Processing and Properties of Al-1.4Mg-0.8Si Alloy: Shuaihang Pan1; Yitian Chi1; Jie Yuan1; Tianqi Zheng1; Xiaochun Li1; 1University of California-Los Angeles
Nanoparticles have been used to facilitate processing and strengthen Al alloys in solidification processing. However, the potential reactivity of Si and its compounds (e.g., β-Mg2Si) with TiC nanoparticles at high temperatures makes solidification processing challenging for Al-Mg-Si containing TiC nanoparticles. Given the broad applications of Al-Mg-Si alloys, how TiC nanoparticles affect its solidification processing and resultant properties is of significance. Here, we systematically studied the modified phase and composition by TiC nanoparticles in as-cast and heat-treated Al-Mg-Si alloys. The interaction between TiC and Si-rich phases like β-Mg2Si has been analyzed. The mechanical performance, including hardness and tensile properties, and fractography have been studied and correlated with the TiC-induced nano-treating effects. This study provides useful insights to develop high-performance Al-Mg-Si alloys with ceramic nanoparticles.