The role of crack closure on fatigue threshold at elevated temperatures
- 1. Osaka Univ., Suita (Japan). Faculty of Engineering
Description
Near threshold fatigue crack growth and crack closure were investigated in SS 41, SM 41 A, SUS 304 steels and A 2218-T 6 Aluminum alloy at elevated temperatures up to 500deg C. Emphasis was placed on examining the role of crack closure on fatigue threshold at elevated temperatures. The fatigue threshold, ΔKth, was found to increase with increasing test temperature in all the steels tested, while it was found to decrease in A 2218-T 6 Aluminum alloy. Oxide-induced crack closure was found to play an important role in the increase of ΔKth at elevated temperatures in SM 41 A, while it was found to play a less important role in SS 41 and SUS 304. It was concluded that oxide products on the fracture surface enhance crack closure only when the CTOD at threshold remains small at elevated temperatures. (author)
Additional details
Publishing Information
- Journal Title
- JSME Int. J.
- Journal Volume
- 31
- Journal Issue
- 271
- Series
- JSME Int. J.
- Journal Page Range
- 92-99
- ISSN
- 0913-185X
- CODEN
- JIJOE
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 19062235
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM BASE ALLOYS; CARBON STEELS; COPPER ALLOYS; CRACK PROPAGATION; CRACKS; FATIGUE; HIGH TEMPERATURE; MAGNESIUM ALLOYS; NUCLEAR POWER PLANTS; OXIDES; STEEL-CR19NI10
- Descriptors DEC
- ALLOYS; ALUMINIUM ALLOYS; AUSTENITIC STEELS; CARBON ADDITIONS; CHALCOGENIDES; CHROMIUM ALLOYS; CHROMIUM-NICKEL STEELS; CORROSION RESISTANT ALLOYS; HEAT RESISTING ALLOYS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; NICKEL ALLOYS; NUCLEAR FACILITIES; OXYGEN COMPOUNDS; POWER PLANTS; STAINLESS STEELS; STEELS; THERMAL POWER PLANTS