7 December 2013 Effect of compositional gradient on mechanical properties in aluminum/duralumin multi-layered clad structures
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Abstract
This study aims to investigate the effect of compositional gradient on nano-, micro- and macro-mechanical properties in aluminum (A1050)/ duralumin (A2017) multi-layered clad structures fabricated by hot rolling. Such multilayered clad structures are possibly adopted to a new type of automobile crash boxes to effectively absorb the impact forces generated when automobiles having collisions. 2- and 6-layered clad structures with asymmetric lay-ups from one side of aluminum to another side of duralumin have been fabricated, which have been suffering three different heattreatments such as (1) as-rolled (no heat-treatment), (2) annealed at 400°C and (3) homogenized at 500°C followed by water quenching and aging (T4 heat treatment). For nano- and micro-scale mechanical properties proved by nanoindentation, higher hardness and elastic modulus correspond to higher Cu content at the interface in annealed and aged samples. For macro-scale mechanical properties, internal friction of 2-layered clad structures is higher than that of 6-layered clad structures in any heat-treatment samples. Deep drawing formability of annealed samples is considerably high compared to as-rolled and aged ones.
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Hideaki Tsukamoto, Yoshiki Komiya, Hisashi Sato, Yoshimi Watanabe, "Effect of compositional gradient on mechanical properties in aluminum/duralumin multi-layered clad structures", Proc. SPIE 8923, Micro/Nano Materials, Devices, and Systems, 89230Q (7 December 2013); doi: 10.1117/12.2033897; https://doi.org/10.1117/12.2033897
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