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Effect of unit size on thermal fatigue behavior of hot work steel repaired by a biomimetic laser remelting process
- Source :
- Optics & Laser Technology. 98:205-213
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- AISI H13 hot work steel with fatigue cracks was repaired by a biomimetic laser remelting (BLR) process in the form of lattice units with different sizes. Detailed microstructural studies and microhardness tests were carried out on the units. Studies revealed a mixed microstructure containing martensite, retained austenite and carbide particles with ultrafine grain size in units. BLR samples with defect-free units exhibited superior thermal fatigue resistance due to microstructure strengthening, and mechanisms of crack tip blunting and blocking. In addition, effects of unit size on thermal fatigue resistance of BLR samples were discussed.
- Subjects :
- Austenite
Materials science
Hot work
02 engineering and technology
021001 nanoscience & nanotechnology
Laser
Microstructure
Indentation hardness
Atomic and Molecular Physics, and Optics
Grain size
Electronic, Optical and Magnetic Materials
law.invention
Carbide
020303 mechanical engineering & transports
0203 mechanical engineering
law
Martensite
Electrical and Electronic Engineering
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 00303992
- Volume :
- 98
- Database :
- OpenAIRE
- Journal :
- Optics & Laser Technology
- Accession number :
- edsair.doi...........ed54cbe176535df91e48213f4cbcbee0