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  • Users: HJM
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  1. HJM

    Fatigue and Manganese Sulfide Stringers

    A big, forged crankshaft was metallographically inspected. On the polished and etched surface near a notch radius at the tap, segregations of manganese sulfide (MnS) were found. The largest inclusions were between 100µm and 300µm wide. The grain size was irregular, indicating that the forging...

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