Cracking process of Fe-26Cr-1Mo during low cycle corrosion fatigue

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90074-4· OSTI ID:7156904

Wang, J Q; Li, J; Wang, Z F; Zhu, Z Y; Ke, W ^[1]; Zang, Q S; Wang, Z G ^[2]

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1. Academia Sinica, Shenyang (China). Corrosion Science Lab.
2. Academia Sinica, Shenyang (China). State Key Lab. for Fatigue and Fracture of Materials

The corrosion fatigue (CF) life has been divided classically into the initiation'' and propagation'' periods. Usually, the crack initiation process dominates the component lifetime under the low cycle CF condition because the crack propagates rapidly one initiated. Despite much work done on the research of the CF crack initiation mechanisms, however, a full understanding of crack initiation is still lacking. There are some limitations in explaining the CF crack initiation in an aqueous solution using the above four mechanisms individually. And, it is difficult to conduct experiments in which one mechanism along can be examined. Although CF is complicated, it is possible to reproduce a specific experiment condition which will have the dominant factor affecting the CF crack initiation. Once the cracks initiate on the smooth metal surface, their coalescence, micropropagation and macropropagation will take place successively. The initiated cracks propagate first in the range of several grains, and the behavior of the microcrack propagation is different from that of macrocrack propagation. For Fe-26Cr-1Mo ferritic stainless steel, the fundamental research work of straining electrode has been done by many investigators, but the observation of the material surface at different deformation processes has not been reported. In the present study, the detailed observation of the cracking process of the material has been carried out in low cycle CF.

• OSTI ID: 7156904
• Journal Information: Scripta Metallurgica et Materialia; (United States), Vol. 31:11; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM STEELS
CORROSION FATIGUE
CRACK PROPAGATION
EXPERIMENTAL DATA
SERVICE LIFE
SODIUM CHLORIDES
STRAIN RATE
ALKALI METAL COMPOUNDS
ALLOYS
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
DATA
FATIGUE
HALIDES
HALOGEN COMPOUNDS
HIGH ALLOY STEELS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LIFETIME
MECHANICAL PROPERTIES
NUMERICAL DATA
SODIUM COMPOUNDS
STAINLESS STEELS
STEELS
360103* - Metals & Alloys- Mechanical Properties