The testing performance of various bronze bushes

Abstract

In the experimental work described in this report various bronze alloy bushes made by different methods were tested at slow speed and high pressure, for periods of up to 550 minutes. The properties of bushes made by a novel centrifugal casting technique which involved the incorporation of a bonded sand inner mould in a rotating die block were compared with bushes (a) cast in static sand moulds, and (b) commercially made to British Standard from continuously cast bar stock. Various tests were completed and these included a comparison of coefficients of friction, weight loss and bearing running temperature for leaded gunmetal, leaded bronze, phosphor bronze and aluminium bronze. In the tribology tests the bushes made from aluminium bronze proved to be slightly better than the phosphor bronze ones and the experimental centrifugally cast bushes compared favourably with those made commercially by static castings.

Friction and wear behavior of a centrifugally cast lead-free copper alloy containing graphite particles

“…From was found to be lower than that generally observed in the the torque data, the value of the friction coefficient was P/M-produced (15 pct) [18] alloys. In the P/M method, there calculated using the formula is almost a uniform distribution of the graphite particles and pores, while in the current process the porosity is mainly…”

A method to determine acoustic properties of solids and its application to measuring oil film thickness in bearing shells of unknown composition

“…Unfortunately, applying previous methods to determine acoustic impedance is not always feasible. For example, many tribological components such as bearings, piston rings and piston liners are coated with a thin layer of material, such as diamond-like carbon (DLC), chromium ceramic or complex multi-phase alloys such as leaded bronze [5,6,7]. With thin layers, individual acoustic reflections are no longer distinct, making a direct measurement of acoustic velocity via a time-of-flight technique impossible [8].…”

Influence of phase composition on fretting wear behavior of thermally sprayed aluminum bronze coatings

“…Benefiting from the ultrahigh cooling rate of molten droplets in APS technology, which can reach up to 10 6 K/s, 9 the brittle γ″ phase can be avoided, which is often inevitable in other processes (such as cast or wrought) due to limited cooling rate. 10,11 CuAl alloy coatings used in engineering are often duplex coatings containing α + β ′ phase. 12 The α -phase is solid solution of copper containing less than 9% Al (mass percentage) and it has good ductility but low hardness and yield strength.…”