The Effect of Heat Treatment on Static and Dynamic Mechanical Properties of Rapidly Solidified and Plastically Consolidated RS442 Aluminium Alloy

Abstract:

Ultra-fine grained metallic materials are characterized by higher mechanical properties comparing with their conventional equivalents. However increase in strength under static load is not always accompanied by improved fatigue behaviour. Previous investigations on submicrocrystalline RS442 aluminium alloy produced by plastic consolidation of rapidly solidified flakes in the extrusion process revealed increase in its high cycle fatigue bending strength caused by annealing at 450°C. The aim of present studies was to evaluate the influence of heat treatment – also precipitation hardening – on static mechanical properties (hardness, tensile and yield strength) and fatigue strength of the alloy determined in high cycle stress controlled bending tests. Correlation between microstructure, static mechanical properties and fatigue behaviour was analyzed too.

• Periodical: Key Engineering Materials (Volume 641)
• Pages: 17-23
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.641.17
• Online since: April 2015
• Authors: Maciej Motyka, Tomasz Tokarski, Waldemar Ziaja*, Mateusz Wedrychowicz
• Keywords: Fatigue Strength, Heat Treatment, Mechanical Properties, Plastic Consolidation, Rapid Solidification, Submicrocrystalline Aluminium Alloys

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