Acoustic Emission Monitoring the Fatigue Crack Growth in SM50B-Zc Steel

J Mater Sci Technol ›› 1990, Vol. 6 ›› Issue (5): 345-350.

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Acoustic Emission Monitoring the Fatigue Crack Growth in SM50B-Zc Steel

ZHU Zuming WA NG Zhongguang PENG Jun ** Laboratory of Fatigue and Fracture for Materials,Institute of Metal Research,Academia Sinica,Shenyang,110015,China.To whom correspondence should be addressed.

Received:1990-09-28 Revised:1990-09-28 Online:1990-09-28 Published:2009-10-10

Abstract

Abstract: The acoustic emission(AE)characteristics from the fatigue crack propagation in SM50B-Zc steel were strongly affected by the environment me- dium.The AE feature from the fatigue process both in air and in 3.5% NaCl aqueous solution mani- fested a periodicity which indicated the fatigue ex- tension was discontinuous.The fatigue striation and secondary cracking were the main AE sources during the fatigue crack growth in air.In contrast, AE during the fatigue crack propagation in 3.5% NaCl solution was released from the intergranular fracture and quasicleavage cracking.

Key words: acoustic emission, fatigue crack, SM50B-Zc steel, quasicleavage cracking, intergranular fracture

ZHU Zuming WA NG Zhongguang PENG Jun ** Laboratory of Fatigue and Fracture for Materials,Institute of Metal Research,Academia Sinica,Shenyang,110015,China.To whom correspondence should be addressed.. Acoustic Emission Monitoring the Fatigue Crack Growth in SM50B-Zc Steel[J]. J Mater Sci Technol, 1990, 6(5): 345-350.

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Acoustic Emission Monitoring the Fatigue Crack Growth in SM50B-Zc Steel

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