Volume 9: Mechanics of Solids, Structures and Fluids 2014
DOI: 10.1115/imece2014-36865
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High Cycle Fatigue Strength of Modified 9Cr-1Mo Steel at Elevated Temperatures

Abstract: In order to clarify the characteristics of high-cycle fatigue of the modified 9Cr-1Mo steel, a high temperature rotary bending test was carried out. As a result, the fatigue strength of this alloy decreased monotonically at elevated temperatures. It decreased from 440 MPa at room temperature to about 350 MPa at 400°C. This decrease of the fatigue strength was attributed to the temperature dependence of the yielding strength of this alloy. The fatigue limit appeared near 107 cycles at 400°C, whereas it appeared… Show more

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Cited by 3 publications
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“…It is widely used in the welding and post-welding repair of high-temperature materials such as heat resistant steel, such as 9-12%Cr heat resistant steel which was used in ultra-supercritical turbine rotor, cylinder, pipeline and other key components [3,4]. In the process of steam turbine startup and shutdown, there would experience great temperature change and then alternate stress low cycle fatigue damage [5,6]. Moreover, in the long-term normal operation of the equipment, components would also suffer from high cycle fatigue damage of alternating stress due to the change of steam pressure [7,8].…”
Section: Introductionmentioning
confidence: 99%
“…It is widely used in the welding and post-welding repair of high-temperature materials such as heat resistant steel, such as 9-12%Cr heat resistant steel which was used in ultra-supercritical turbine rotor, cylinder, pipeline and other key components [3,4]. In the process of steam turbine startup and shutdown, there would experience great temperature change and then alternate stress low cycle fatigue damage [5,6]. Moreover, in the long-term normal operation of the equipment, components would also suffer from high cycle fatigue damage of alternating stress due to the change of steam pressure [7,8].…”
Section: Introductionmentioning
confidence: 99%