文章基本信息

标题：Ultrasonic Fatigue Analysis on an Austenitic Steel at High Temperature
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作者：Federico Cavalieri ; Claude Bathias ; Nicolas Ranc 等
期刊名称：Mecánica Computacional
印刷版ISSN：2591-3522
出版年度：2008
卷号：XXVII
期号：16
页码：1205-1224
出版社：CIMEC-INTEC-CONICET-UNL
摘要：In this work, an ultrasonic fatigue technique is presented to study the fatigue behavior on an austenitic steel at high temperatures under fully reverse loading (R=-1) in the lifetime range from 105 to 109 cycles. This material is employed in internal combustion engine valves. To carry out the fatigue tests at high temperatures, an induction coil heating equipment was employed to achieve temperatures
as high as 600C and 700C on the specimens. Since Young modulus is a function of temperature, its value changes when the specimen is heated. We analyzed with a numerical methodology (finite element method, FEM), the effects of the variation in the Young modulus due to temperature from the
measurement of the ultrasonic resonance frequency. Thermal, thermo-mechanical and modal analysis by FEM was used for designing the specimens at test temperatures. The commercial software was employed for the numerical simulations.