Induced elastic anisotropy in a bulk metallic glass

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• 作者：A. Concustell^a ; ^b ; S. Godard-Desmarest^b ; ^c ; M.A. Carpenter^d ; N. Nishiyama^e ; A.L. Greer^b ; ^f ; ^{alg13@cam.ac.uk}
• 关键词：Acoustic methods ; Anisotropy ; Bulk metallic glass ; Creep ; Elastic behavior
• 刊名：Scripta Materialia
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：64
• 期：12
• 页码：1091-1094
• 全文大小：256 K

文摘

Full evaluation of the elasticity tensor of a bulk metallic glass (Pd₄₀Cu₃₀Ni₁₀P₂₀) shows anisotropy induced by creep under uniaxial compression changing sign with increasing strain. Anisotropy due to anelastic strain is erased by zero stress annealing. At higher strain anisotropy of opposite sign suggests structural alignment by plastic flow. Induced anisotropy is most evident in the Poisson ratio, may relate to other properties, including the strength and toughness of metallic glasses, and may lead to misinterpretation of annealing effects.