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Characterisation of mechanically milled 17-4 PH gas atomized stainless steel powders
AbstractA laboratory scale Szegvari type vertical mechanical alloying (MA)/mechanical milling (MM) attritor for research purposes was designed and constructed at Gazi University. By using this attritor, optimum processing parameters such as milling time, milling speed (rev/min), diameter and the amount of milling balls, milling atmosphere were determined when MM’ing of gas atomized 17-4PH stainless steel powders were carried out. After the milling, powder size analyses and microscopic studies (optical and SEM) were utilized for characterization of the as-received and milled powders. It was observed from the results of the present investigation that for 17-4PH stainless steel (SS) powders, optimum properties were obtained when mechanical milling at Gazi University attritor was carried out at 500rev/min in Ar gas by using 250g of 10mm diameter hardened chromium steel balls. It was also observed that MM time has a profound influence on the characteristics (such as particle size, shape and distribution) of MM’ed 17-4 PH gas atomized SS powders depending on the two competing mechanisms, namely, the rate of welding and the rate of fracturing.
Characterisation of mechanically milled 17-4 PH gas atomized stainless steel powders
AbstractA laboratory scale Szegvari type vertical mechanical alloying (MA)/mechanical milling (MM) attritor for research purposes was designed and constructed at Gazi University. By using this attritor, optimum processing parameters such as milling time, milling speed (rev/min), diameter and the amount of milling balls, milling atmosphere were determined when MM’ing of gas atomized 17-4PH stainless steel powders were carried out. After the milling, powder size analyses and microscopic studies (optical and SEM) were utilized for characterization of the as-received and milled powders. It was observed from the results of the present investigation that for 17-4PH stainless steel (SS) powders, optimum properties were obtained when mechanical milling at Gazi University attritor was carried out at 500rev/min in Ar gas by using 250g of 10mm diameter hardened chromium steel balls. It was also observed that MM time has a profound influence on the characteristics (such as particle size, shape and distribution) of MM’ed 17-4 PH gas atomized SS powders depending on the two competing mechanisms, namely, the rate of welding and the rate of fracturing.
Characterisation of mechanically milled 17-4 PH gas atomized stainless steel powders
Çetinkaya, Cemil (author) / Fındık, Tayfun (author) / Özbilen, Sedat (author)
2005-07-05
6 pages
Article (Journal)
Electronic Resource
English
Characterisation of mechanically milled 17-4 PH gas atomized stainless steel powders
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