Effects of pulse current stimulation on the thermal fatigue crack propagation behavior of CHWD steel
Creators
- 1. Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science and Engineering, Jilin University, No. 142 Renmin Street, Changchun 130025 (China)
- 2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130023 (China)
Description
The fatigue crack propagating behaviors of cast hot working die (CHWD) steel untreated and treated by an electric current in the intermediate stage of thermal fatigue were investigated in the present study. The circle/elliptical heating affected zone (HAZ) was formed ahead of the notch tip on the fatigued specimens after pulse electric current stimulation. Both SEM observation and X-ray diffraction analysis revealed that pulse electric current stimulation refined grains/subgrains in the HAZs. With the prolonging of discharging duration, the grains/subgrains decreased in size and the dislocation density and microhardness increased gradually. The grain refinement and dislocation density increase played an important role in the material strengthening, which inevitably enhanced the propagation resistance and delayed the propagation of thermal fatigue cracks. Therefore, the pulse electric current stimulation was an effective method to improve the service lifetime of die material
Availability note (English)
Available from http://dx.doi.org/10.1016/j.msea.2007.05.077Additional details
Identifiers
- DOI
- 10.1016/j.msea.2007.05.077;
- PII
- S0921-5093(07)01097-0;
Publishing Information
- Journal Title
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
- Journal Volume
- 478
- Journal Issue
- 1-2
- Journal Page Range
- p. 93-100
- ISSN
- 0921-5093
- CODEN
- MSAPE3
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39068842
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CRACK PROPAGATION; CRACKS; DISLOCATIONS; ELECTRIC CURRENTS; GRAIN REFINEMENT; HEAT AFFECTED ZONE; HOT WORKING; MICROHARDNESS; PULSES; SCANNING ELECTRON MICROSCOPY; STEELS; STIMULATION; THERMAL FATIGUE; X-RAY DIFFRACTION
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; COHERENT SCATTERING; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; CURRENTS; DIFFRACTION; ELECTRON MICROSCOPY; FABRICATION; FATIGUE; HARDNESS; IRON ALLOYS; IRON BASE ALLOYS; LINE DEFECTS; MATERIALS WORKING; MECHANICAL PROPERTIES; MICROSCOPY; SCATTERING; TRANSITION ELEMENT ALLOYS; ZONES
Optional Information
- Copyright
- Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.