模拟镍的蠕变

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL
R. Sandström, Jing Zhang
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引用次数: 3

摘要

许多金属和合金的蠕变速率的应力指数远远高于蠕变恢复模型通常预测的值3。一个例子是纯Ni。本文分析了Norman和Duran的蠕变数据,在熔点的0.3-0.55温度范围内,应力指数约为7。最近的研究表明,Al和Cu在幂律击穿状态下的高蠕变指数可以用应变诱导空位的存在来解释。采用不含可调参数的蠕变恢复模型,发现应变引起的空位也能解释纯镍的高应力指数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modeling the Creep of Nickel
Many metals and alloys have a stress exponent for the creep rate that is considerably higher than the value of three that is typically predicted by creep recovery models. One example is pure Ni. Creep data from Norman and Duran that are analyzed in the paper give a stress exponent of about seven in the temperature range 0.3–0.55 of the melting point. It has recently been shown that the high creep exponent of Al and Cu in the power-law breakdown regime can be explained by the presence of strain-induced vacancies. By applying a creep recovery model that does not involve adjustable parameters, it is shown that strain-induced vacancies can also explain the high-stress exponent of pure nickel.
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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