Low‐Cycle Fatigue Properties and Life Prediction of the Steels with Trace Silicon

Zhang, Meng Xiao; Pang, J.C.; Zhu, Li Bei; Zhang, Zhen Jun; Nie, Liang Liang; Mao, Yun Xian; Chen, Man; Zhang, Zhe Feng

doi:10.1002/adem.201600581

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…Ho et al systemically studied the mechanical properties of the 35CS300 and 50CS400 electromagnetic steels, and pointed out that their surfaces of the insulating layer under dynamic fatigue loading would cause fragmentation, but the mechanism is still unclear. For the special service conditions of the motor generator rotor, we studied the LCF property of steel sheet with trace silicon and pointed out that the energy fatigue life prediction method is applicable and then predicted service life of the component. Since, the tensile and fatigue strengths are the important properties for material choice and structure design, the tensile and high‐cycle fatigue (HCF) properties should be studied.…”

Section: Introductionmentioning

confidence: 99%

Tensile and High‐Cycle Fatigue Properties of Steel Sheet with Trace Silicon

et al. 2017

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The tensile properties, high-cycle fatigue properties, fracture surface morphologies, corresponding damage mechanisms, and dislocation patterns of two steels with trace silicon, 550TG and SD320, are investigated. It is found that the SD320 has a higher tensile strength than 550TG, but lower plasticity. In general, some deep cracks appear along the direction of rolling in all the tensile specimens and the fatigue limit of SD320 is higher. In particular, the 550TG shows a continuously decreasing S-N characteristic without fatigue limit at the higher cycle region, which can be explained by their differences of dislocation morphologies. Furthermore, the tensile and fatigue damage mechanisms are deeply analyzed and discussed.

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Section: Introductionmentioning

confidence: 99%

Tensile and High‐Cycle Fatigue Properties of Steel Sheet with Trace Silicon

et al. 2017

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“…In the present work, the magnetic pole material, 550TG silicon steel was used, which has been widely used in the motor-generator rotor because of its better magnetic conductivity (Zhang et al., 2016). And the chemical compositions and mechanical properties are given in Table 1 (Zhang et al., 2017).…”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

A fatigue life prediction method from magnetic pole material to simulation part

Pan

Pang

Xie

et al. 2019

International Journal of Damage Mechanics

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Due to the higher reliability needs of the large moving component motor-generator rotor, the assessment of the service life has drawn more and more attention. After finite element analysis of the rotor, the simulation part which can represent the magnetic pole with the most dangerous position of the rotor was designed to investigate the S–N curves. Compared with the conventional specimen, considering the main influencing factors of fatigue life for simulation part, the comprehensive factor was proposed to establish the fatigue life relationship between magnetic pole material and simulation part. It was found that the calculation method of fatigue notch factor based on the notch sensitivity factor is relatively simple and practical, and there is no significant effect of surface roughness on high and low cycle fatigues for low roughness ( R a is about 1 µm), and the dimension factor changes linearly with the scale factor. Based on those results, a fatigue life prediction method was proposed and validated, and the predicted results were in good agreement with the experimental data. This study will provide a reasonable reference to determine the fatigue life prediction of large moving components.

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“…In the present work, hot rolling steel plate 550TG was used, which has been widely used in the motor‐generator rotor because of its better magnetic conductivity . And the chemical compositions and mechanical properties are given in Table …”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

“…33 And the chemical compositions and mechanical properties are given in Table 2. 34 The full-scale of motor-generator rotor is a very large moving component as shown in Figure 4A. 6 Because of structural symmetry, 1/12 of the full-scale part is used to reduce the computational work, and the stress field analysis result of magnetic pole and yoke by FEM is shown in Figure 4B.…”

Section: Experimental Materials and Specimensmentioning

confidence: 99%

A prediction method for fatigue life of large moving components as function of scale factor: A case of motor‐generator rotor

Pan

Pang

Zhang

et al. 2017

Fatigue Fract Eng Mat Struct

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With the development of science and technology, more and more large moving components have been used in industry, and their service lives have become an important issue. After analysis of the previous results, considering the scale factor, a prediction method for fatigue life of large moving components based on the Basquin relation was proposed at first, and then the magnet pole part of motor‐generator rotor was chosen to make simulation parts with different scale factors mainly in terms of their S‐N curves and fractographies. It was found that with the change of specimen scale factor, the stress concentration factor at transition arc is almost unchanged as well as the fatigue strength exponent, and the fatigue strength coefficient changes linearly. Based on those results, a life prediction method was validated, and the results show that this method is a simple but more precise relation. After fatigue fracture surface and crack growth angle observations and quantitative analyses, the fatigue damage mechanisms associated with the relation among fatigue strength exponent and coefficient and scale factors were explained well. Those studies will provide a new clue to the prediction of the service life for those large moving components.

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Low‐Cycle Fatigue Properties and Life Prediction of the Steels with Trace Silicon

Cited by 6 publications

References 21 publications

Tensile and High‐Cycle Fatigue Properties of Steel Sheet with Trace Silicon

Tensile and High‐Cycle Fatigue Properties of Steel Sheet with Trace Silicon

A fatigue life prediction method from magnetic pole material to simulation part

A prediction method for fatigue life of large moving components as function of scale factor: A case of motor‐generator rotor

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