Three body abrasive wear of carbide-free bainite martensite and bainite-martensite structure of similar hardness
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
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| Title |
Three body abrasive wear of carbide-free bainite martensite and bainite-martensite structure of similar hardness
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| Creator |
Shah, Minal
Bakshi, Subhankar Das |
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| Subject |
Materials Charcterization
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| Description |
The three-body abrasive wear behavior of three ferrous alloys with different microstructures but similar hardness has been investigated using a standard dry-sand rubber wheel test (ASTM G65-16). Although the hardness of the alloys was similar, the abrasion rates are radically different owing to differences in abrasion mechanisms in their microstructures. A carbide-free bainitic steel having fine bainitic laths exhibited better abrasion resistance owing to the strain- induced transformation of austenite into martensite. Nano-scaled martensitic laths that formed on the surface resisted plastic deformation during abrasion and thereby increased the abrasion resistance. The microstructure containing bainitic ferrite undergoes extensive plastic deformation associated with a large quantity of dislocations, which in turn accommodates the strain of abrasion. The steel with a blocky-martensitic microstructure had the least wear resistance. In that case, fragmentation and chipping comprised the prominent abrasion mechanism. The degeneration of a martensitic structure and its subsequent tempering radically reduces the hardness at the surface and makes it more susceptible to abrasion. Steel containing a mixture of bainite and martensite had intermediate abrasion resistance relative to the other two alloys.
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| Publisher |
Elsevier
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| Date |
2018
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| Type |
Article
PeerReviewed |
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| Relation |
http://eprints.nmlindia.org/7798
http://eprints.nmlindia.org/7798/ |
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| Identifier |
Shah, Minal and Bakshi, Subhankar Das (2018) Three body abrasive wear of carbide-free bainite martensite and bainite-martensite structure of similar hardness. Wear, 402 (IF-2.960). pp. 207-215.
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