Alpas Ball Gr

The experiments in this work are conducted in a MTM–SLIM ball on disc test rig as shown in Fig. 1.In the normal operation of this rig, a 19.05-mm-diameter ball made of AISI 52100 (Ra = 0.02 μm) is loaded against a flat surface of a 46-mm-diameter steel disc or Al–Si disc (AISI 52100, Ra = 0.01 μm or A390, Ra = 0.05 μm) which is immersed in the oil sample.

Alpas: Effect of temperature on the sliding wear performance of Al alloys and Al matrix composites, Wear 196 (1996), No. 270–2/0043-163-2 Crossref Google Scholar. Kontaktirajte nas 091 23 22 110 095 549 1897 031 333 100.

Abstract:

This paper explores the wear characteristics of nanocrystalline Mg-5%Al-5%Nd, synthesized by mechanical alloying. Pin-on-disc unlubricated sliding wear tests were conducted against a hardened tool-steel counterface under loads of 10 and 30 N, and within a velocity range of 0.2-5.0 m/s. Despite its appreciably superior mechanical properties, the nanostructured alloy did not exhibit the expected improvement in wear resistance when compared to its conventional microngrain- sized counterpart; in fact, the former performed worse when testing conditions became more severe. Scanning electron microscopy (SEM) suggested that extensive delamination in the nanocrystalline alloy was the primary reason for its high wear rates. This wear mechanism was promoted by the presence of MgxNd dispersiods, which were found only within the nanocrystalline material. These compounds likely resulted from the long duration (20 hrs) of ball-milling, which was the mechanical alloying technique employed to reduce the grain size of the final alloy.

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Alpas Ball Grabbers

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Alpas Ball Grip

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Alpas Ball Green

Alpas Ball Grips

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