Aluminum Bronze Shaft

Aluminum Bronze Shaft

aluminum bronze shaft

Although this alloy typically exhibits strength comparable to many steels, these shafts literally fell apart on the lathe during machining. Defective heat treating resulted in severe segregation of the alloying elements. Normal microstructure is shown at (A). Large brittle grains of segregated alloying elements are shown at (B), which resulted in catastrophic brittle fracture (C). (Mag. 200X)