Mechanical Properties of Tin-Based Babbitt Alloy using the Direct Extrusion technique

Abstract

Tin Babbitt is an ideal journal bearing material, because of its microstructural properties, which qualifies these alloys as a bearing material. Effect of the Babbitt die casting (ASTM B23 Alloy 2) on its microstructure and the hardness properties were studied. The forward extrusion type was carried out using cosine profile and the five different reduction area such 5%, 10%, 15%, 20% and 40%. The results show that the refinement of hard phases of Cu6Sn5 and SbSn led to increasing the hardness value after casting, and after extrusion for all reduction percent, except reduction 40%, the dynamic recrystallization is dominant which led to hardness decrease. The result also shows that the extrusion pressure increases with increasing the reduction value. Moreover, cold deformation improved the hardness properties for Babbitt alloy by refinement of the Cu6Sn5 phase.

Experimental investigations of heat generation and microstructure evolution during friction stir processing of SnSbCu alloy

“…FSP generates a significant increase in temperature due to frictional forces, intense plastic deformation, and material flow caused by the movement of the tool, thus promoting dynamic recrystallization (DRX) in the stir zone (SZ). The research results presented by Zainulabdeen et al [40] prove the dynamic recrystallization of bearing alloys on a tin matrix during downward extrusion. In turn, Sadykov [25] writes that recrystallization will take place at room temperature after inflicting 20% cold deformation.…”

Investigation of the Properties of Anti-Friction Coatings Deposited with Different Casting Methods

“…Cu helps prevent deformation and plastic flow of the coating under load, through which the required distance between the contacting surfaces is kept stable [ 44 ]. Sb adds hardness to the Babbitt alloy coating and increases its wear resistance [ 45 , 46 , 47 , 48 ]. This factor is critical in applications where the contacting surfaces experience high friction, such as in bearings or other sliding surfaces [ 14 , 49 , 50 , 51 ].…”

Jelatin ve PVA kaplı nanopartiküller ile EP yağ katkısının tribolojik performanslarının araştırılması

“…Uygun yağlayıcı ve yağ katışkılarının kullanımı ile yatakların yorulma dayanımı, dolayısıyla çalışma ömrü arttırılabilmektedir. Günümüzde yatak malzemesi olarak kalay bronzları yaygın olarak kullanılmaktadır [1][2][3]. Bu alaşımlar yüksek korozyon ve aşınma direncine, yüksek termal iletkenliğe ve kendinden yağlanma özelliklerine sahiptirler [4][5][6].…”