Model
Digital Document
Publisher
Florida Atlantic University
Description
A fatigue machine was rebuilt to investigate the wear of mild steel and
AISI Type 304 stainless steel while undergoing cyclic relative motions
in air and sea water environments. Wear curves were obtained for both
materials by measuring specimen weight loss as a function of the number
of cycles of relative motion, and surface damage of the specimens was
photographed. The results indicate that a sea water environment has a
strong influence upon the wear characteristics of mild steel and 304
stainless steel. For the mild steel, the corrosive effects of the sea
water contributed to severe pitting and cracking of the wear surface
and resulted in a significant increase in wear; after approximately
2.5 million cycles the amount of wear in sea water was approximately
three times that in air. For the stainless steel, the sea water acted
primarily as a lubricant and coolant, and served to reduce the amount
of wear after 2.5 million cycles to about one-tenth of that in air.
AISI Type 304 stainless steel while undergoing cyclic relative motions
in air and sea water environments. Wear curves were obtained for both
materials by measuring specimen weight loss as a function of the number
of cycles of relative motion, and surface damage of the specimens was
photographed. The results indicate that a sea water environment has a
strong influence upon the wear characteristics of mild steel and 304
stainless steel. For the mild steel, the corrosive effects of the sea
water contributed to severe pitting and cracking of the wear surface
and resulted in a significant increase in wear; after approximately
2.5 million cycles the amount of wear in sea water was approximately
three times that in air. For the stainless steel, the sea water acted
primarily as a lubricant and coolant, and served to reduce the amount
of wear after 2.5 million cycles to about one-tenth of that in air.
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