A model of creep based on interacting elements and its application to the primary creep of fully-lamellar γ-TiAl

被引：0

作者：

Daehn, GS ^{[1
]}

Viswanathan, GB ^{[1
]}

Mills, MJ ^{[1
]}

Vasudevan, VK ^{[1
]}

机构：

[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA

来源：

CREEP BEHAVIOR OF ADVANCED MATERIALS FOR THE 21ST CENTURY | 1999年

关键词：

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model for the creep of fully lamellar gamma -TiAl (Ti-48Al) is constructed based upon two kinds of elements that represent creep due to screw dislocations dragging jogs, and the penetration of interlamellar interfaces. These two kinds of elements are randomly arranged in a square array of sites and as one element slips load is shed to neighboring sites, keeping the average stress on all elements constant. It is shown that this approach to modeling creep produces a very realistic primary creep transient. The features of this transient are best shown on log-log axes. Experimental data plotted this way also suggests that rate controlling steps for the primary creep and quasisteady state creep can be distinguished.

引用

页码：31 / 40

页数：10

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