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| PREVENTION OF STRESS CORROSION CRACKING IN WELD JOINT OF TYPE 304 STAINLESS STEEL BY GLASS-BEAD PEENING |
| ;;Weiwei Peng |
| 南京工业大学 |
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Abstract Based on X-ray measurements of the residual stresses of shot peened and unpeened welded plates of 304 stainless steel,effects of glass bead peening and cast steel shot peening on stress corrosion susceptibility of weld joints of AISI type 304 stainless steel in boiling 42% MgCl2 were studied.Comparison of the potential against SCC of specimens peened by glass beads and cast steel shot
s were carried on.The test results show:unpeened specimens crack within 6 hours.The steel-peened specimens with 50% coverage crack in boiling 42% MgCl2 after immersion for 310 hours,while the steel-peened specimens with 100% coverage crack after immersion for 3500 hours.However,cast steel-peened specimens with 200% coverage and glass-peened specimens with 50%,100% and 200% coverage are tested for a total of 3500 hours without visible stress corrosion cracks in the peen
ed surfaces.In a word,shot peening is an effective method for protecting weldments against SCC,and weldments peened by glass beads resist SCC better than those peened by cast steel shots.
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Received: 21 July 2004
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Corresponding Authors:
Weiwei Peng
E-mail: yuwei0492@sina.com
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