EFFECT OF SILVER ON MECHANICAL PROPERTIES OF HEAT TREATED ALUMINIUM-BRONZES

Abstract

Aluminiu . bronzes, particularly thos e approaching the eutectoid composition are very promising alloys as future engineering materials because of the combination of various useful properties like corrosion resistance and possibility of heat-treating like stools. Thoy possess moderately high strength and hardness with adequate ductility in tempered condition* Horever, the intergranular brittle fracture and low modulus of elas-tioity of its martensite restricts its commercial appli-cation. The effect of silver as ternary element was studied in a bid to make the alloy more usable. 8i1ver having larger atomic diameter than the Cw-Al euteatoid, is expected to improve the mechanical proper tics and also avoid the intergranular brittle fracture by preventing the , segregation of aluminium atom at the ,;rain boundary. 3inaryr and ternary alloys iit ► a nominnll composition of about 11 per cent aluminium and ternary with 0.75 and 1.5 per cent silver iere employed in the present, investigation