Fatigue Characteristics of Laser Surface-Hardened Cast IronsSource: Journal of Engineering Materials and Technology:;1987:;volume( 109 ):;issue: 003::page 179Author:P. A. Molian
DOI: 10.1115/1.3225961Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Contrary to expectations, laser surface heat treatment has a deleterious effect on the fatigue performance of pearlitic gray and ductile cast irons. A 1.2 kW, continuous wave, CO2 gas laser, operating in square beam mode, was employed to heat-treat the surfaces of standard fatigue specimens. Rotational-bending fatigue tests were then conducted on untreated (as-cast) and laser treated specimens. Results indicated that the effect on fatigue behavior of case depth, microstructure and hardness of laser-hardened surface layers were opposite to that observed in carbon and low alloy steels. A fracture model based on the presence of graphite, residual stresses, and strain-induced transformation is postulated to explain the adverse effect of laser hardening of cast irons.
keyword(s): Irons (Textile pressing) , Lasers , Fatigue , Heat , Alloys , Steel , Gas lasers , Residual stresses , Heat treating (Metalworking) , Waves , Carbon , Fracture (Process) , Fatigue testing , Graphite AND Laser hardening ,
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| contributor author | P. A. Molian | |
| date accessioned | 2017-05-08T23:24:50Z | |
| date available | 2017-05-08T23:24:50Z | |
| date copyright | July, 1987 | |
| date issued | 1987 | |
| identifier issn | 0094-4289 | |
| identifier other | JEMTA8-26917#179_1.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/102504 | |
| description abstract | Contrary to expectations, laser surface heat treatment has a deleterious effect on the fatigue performance of pearlitic gray and ductile cast irons. A 1.2 kW, continuous wave, CO2 gas laser, operating in square beam mode, was employed to heat-treat the surfaces of standard fatigue specimens. Rotational-bending fatigue tests were then conducted on untreated (as-cast) and laser treated specimens. Results indicated that the effect on fatigue behavior of case depth, microstructure and hardness of laser-hardened surface layers were opposite to that observed in carbon and low alloy steels. A fracture model based on the presence of graphite, residual stresses, and strain-induced transformation is postulated to explain the adverse effect of laser hardening of cast irons. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Fatigue Characteristics of Laser Surface-Hardened Cast Irons | |
| type | Journal Paper | |
| journal volume | 109 | |
| journal issue | 3 | |
| journal title | Journal of Engineering Materials and Technology | |
| identifier doi | 10.1115/1.3225961 | |
| journal fristpage | 179 | |
| journal lastpage | 187 | |
| identifier eissn | 1528-8889 | |
| keywords | Irons (Textile pressing) | |
| keywords | Lasers | |
| keywords | Fatigue | |
| keywords | Heat | |
| keywords | Alloys | |
| keywords | Steel | |
| keywords | Gas lasers | |
| keywords | Residual stresses | |
| keywords | Heat treating (Metalworking) | |
| keywords | Waves | |
| keywords | Carbon | |
| keywords | Fracture (Process) | |
| keywords | Fatigue testing | |
| keywords | Graphite AND Laser hardening | |
| tree | Journal of Engineering Materials and Technology:;1987:;volume( 109 ):;issue: 003 | |
| contenttype | Fulltext |