Environmentally assisted cracking of 50% Mn-18% Cr-4% W-N steel for a generator retaining ring and its countermeasure
The stress corrosion cracking (SCC) threshold value (K{sub ISCC}), crack propagation rates of SCC and corrosion fatigue (CF) of 50% Mn-18% Cr-4% W-N steel for generator retaining rings were tested in 80 C water, 3.5% sodium chloride (NaCl) aqueous solution, water vapor of 85% relative humidity (RH), and 3.5% NaCl aqueous solution plus inhibitor. Microscopic features of crack path and fracture morphology were analyzed by optical and scanning electron microscopes. Results showed that all environmental media-induced, environmentally assisted cracking of steel; fluctuating load promoted SCC; and CF crack propagation of steel was counteracted by the inhibitor.
- Research Organization:
- Jiaotong Univ., Xian (CN)
- OSTI ID:
- 20006454
- Journal Information:
- Corrosion (Houston), Journal Name: Corrosion (Houston) Journal Issue: 12 Vol. 55; ISSN 0010-9312; ISSN CORRAK
- Country of Publication:
- United States
- Language:
- English
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