The effect of proof loading on the fatigue behavior of open link chain
Article Abstract:
The results of constant amplitude fatigue tests on a proof-loaded open link chain is given. Each link is 50 mm long and 36 mm wide with a diameter of 10 mm. The chain is produced following ANSI/ASTM A-391-86 specifications. Results show that proof loading lengthens the fatigue life of the open link chain. The residual stresses could be used in analyzing the fatigue life of chain including the benefits of proof loading. The mathematical modeling of the fatigue life should not only include the residual stress values but also the ability of the steel material to tolerate the residual stresses.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1992
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Laboratory simulations
Article Abstract:
The factors that contribute to corrosion fatigue cracking of low alloy boiler tube steels are investigated through laboratory simulations. A waterwall boiler tube is subjected to simulated high temperature corrosion and thermal fatigue experiments. The simulation process and cracks are then evaluated using the finite element analysis. Results indicate that the interaction between intergranular surface corrosion and thermal stress causes fatigue cracking in low alloy boiler tubes.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1992
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Initiation and propagation
Article Abstract:
The circumferential crack failure process in low alloy boiler tube steels are investigated through microstructural analysis. The steels' corrosion-fatigue crack initiation and propagation mechanisms at different points are obtained by studying cross-sectional micrograph images of cracked strcucture samples. Results indicate that the cracking process is caused by the interaction between corrosiona and fatigue at the tube surface during actual boiler operation.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1992
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