Influence of Grain Coarsening on the Creep Parameters During the Superplastic Deformation of a Severely Friction Stir Processed Al-Zn-Mg-Cu Alloy

被引：5
|
作者：
Orozco-Caballero, Alberto [1 ,2 ]
Ruano, Oscar A. [1 ]
Carreno, Fernando [1 ]
机构：
[1] CENIM CSIC, Dept Phys Met, Avda Gregorio del Amo 8, Madrid 28040, Spain
[2] Univ Manchester, Sch Mat, MSS Tower, Manchester M13 9PL, Lancs, England
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2017年 / 48A卷 / 09期
关键词：
SEVERE PLASTIC-DEFORMATION; STRAIN RATE SUPERPLASTICITY; 7075; ALUMINUM-ALLOY; HIGH-TEMPERATURE DEFORMATION; MICROSTRUCTURAL STABILITY; NANOSTRUCTURED MATERIALS; MECHANICAL-BEHAVIOR; DIFFUSION; METALS; 7075-ALUMINUM-ALLOY;
D O I：
10.1007/s11661-017-4198-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
During grain boundary sliding in ultrafine-grain materials at intermediate temperatures and high strain rates (similar to 10(-2) s(-1)), apparent creep parameters usually deviate from the theoretical values, due to microstructural coarsening. An analysis has been carried out in a severely friction stir processed (FSP) 7075 alloy with three different ultra-fine grain sizes (L), obtaining explicit grain size dependence of the creep parameters n (ap) = n (ap)(L) and Q (ap) = Q (ap)(L), confirming the validity of the theoretical values of these parameters in the constitutive equation.
引用
收藏
页码：3980 / 3984
页数：5
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