科技英语翻译 铝镁合金.docx

Analyses on the Flow Stress of an Al-Mg Alloy During Dynamic RecoveryA comprehensive analysis on flow stress of a wrought Al-Mg alloy is performed to examine the effect of strain. For this study, hot compression tests were carried at different temperatures and strain rates. Corrections of friction and adiabatic heating effects lead to the true stress-true strain curves in the form of dynamic recovery, which reach to a steady-state condition. After correction, constitutive analysis at a constant strain is carried out using hyperbolic-sine equation. The effect of strain on each constitutive parameter is studied to derive a strain-dependent constitutive equation based on hyperbolic-sine equation. Some of constitutive parameters reach to the constant values at the specific strain values. Also, the relations between Zener-Holloman parameter and steady-state values of strain and stress are achieved. In order to develop a strong and general flow stress equation, stress-strain curves are normalized to their steady-state values, which results in an almost similar normalized stress-strain behavior for all of the studied deformation conditionsKeywords ：Al-Mg, constitutive analysis, dynamic recovery, flow stress, hot deformation铝镁合金动态回复中流变应力的研究关于铝镁合金流变应力的综合分析是用来反映应变的影响。在这项研究中，压缩实验将会在不同的温度以及应变率下进行。修正摩擦因素与绝热因素的影响最后得到在动态恢复中达到稳态条件下时的真应力——应变曲线。修正后用hyperbolic-sine方程在恒定应变下分析本构关系。分析本构关系中每个参数对应变的影响可以得到一个依赖于应变的本构方程。某些本构关系中的参数将会在应变达到一个特定值后也变为恒值。同样，还可以得到Z参数与稳态应变应力之间的关系。为了得到一个正确的普遍通用的流变应力方程，将会对应力——应变曲线进行修正达到稳态值，进行拟合后得到的真应力——应变方程将会对其他的变形条件研究提供借鉴。关键词：铝镁合金，本构分析，动态回复，流变应力，热变形。1. IntroductionThe flow stress of metals during hot deformation is one of the main interesting properties of any specific material produced by hot deformation processes such as hot rolling and forging. The Al-Mg aluminum alloys are strategically used in special industries such as aerospace and military because of their high strength-to-weight ratio as well as their other benefits (Ref 1–4). Rolling or any tensile-related d