How do inclsuions like oxides and sulphide contribute to mechanical failure of AISI 4140 grade steel which is used for bearing housing . The oxides sulfides and dulpex oxide -sulfide inclusions are present in microstructure
Praveennath Koppad
Dear Mohammed,
1. Poor homogenization can give rise to inclusions commonly sulfides, oxides. this can initiate cracks
Example: AISI 4140 steel as quenched and tempered; tempered martensite (unetched) microstructure with cracking at inclusions or promoted by inclusions.
2. Sulfides can enhance accumulation of hydrogen and increase the susceptibility of steels to hydrogen embrittlement.
With regards
Praveennath G Koppad
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