Ratcheting Properties of Steel 45 and 42CrMo under High Cyclic Stress

Yue Feng Li; Xu Dong Pan; Guang Lin Wang

doi:10.4028/www.scientific.net/KEM.579-580.52

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Ratcheting Properties of Steel 45 and 42CrMo under High Cyclic Stress
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 579-580Ratcheting Properties of Steel 45 and 42CrMo under...

Ratcheting Properties of Steel 45 and 42CrMo under High Cyclic Stress

Abstract:

Disposable mechanical elements are widely used in many fields such as aerospace and military industries. It is known for their extremely short work time which is quite different from general mechanical elements. The stress level of disposable mechanical elements is much higher than general mechanical elements. In this situation, the traditional fatigue fracture failure will be replaced by fatigue elastic failure used in the design of disposable mechanical elements. The fatigue elastic failure is closely related to the ratcheting properties of materials. Therefore, this paper focuses on the ratcheting properties of typical cyclic softening materials steel 45 and 42 CrMo. The fatigue elastic failure phenomenen of these two materials are shown through the stress control tests.