Numerical Analysis of Distortion due to Inhomogeneous Distribution of Martensite Start Temperature within SAE 52100 Bearing Rings |
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Authors: | Friedhelm Frerichs Thomas Lübben Franz Hoffmann Hans‐Werner Zoch |
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Affiliation: | Stiftung Institut für Werkstofftechnik, Badgasteiner Stra?e 3, D‐28359 Bremen, Germany |
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Abstract: | This paper reports about numerical investigations regarding the spatial distribution of martensite start temperature (Ms) within bearing rings made out of SAE 52100 (100Cr6). Out‐of‐roundness values due to inhomogeneous Ms distribution are calculated by means of FE simulations. In a first step the distribution of Ms is modelled with simple trigonometric functions with different wavelengths and amplitudes of Ms. In addition, more complex distributions of Ms are investigated by means of superposition of different trigonometric functions. Simulations with the commercial FE simulation program SYSWELD® yield dependencies of out‐of‐roundness values of bearing rings on wavelength and amplitude of Ms. The numerical study is supplemented by experimental investigations concerning the distribution of Ms. Typical scatter‐bands of Ms within a work piece were found to be ± 10 K. Concerning this scatter‐band, different possible distributions of Ms are analysed by Fourier transformation. With the resulting trigonometric functions the out‐of‐roundness values are calculated and compared with experimental data. |
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Keywords: | FE‐simulation out of roundness martensite start temperature rings SAE 52100 |
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