Three body abrasive wear of carbide-free bainite martensite and bainite-martensite structure of similar hardness

Shah, Minal and Bakshi, Subhankar Das (2018) Three body abrasive wear of carbide-free bainite martensite and bainite-martensite structure of similar hardness. Wear, 402–403 (IF-2.531). pp. 207-215.

Full text not available from this repository.

Abstract

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.

Item Type:Article
Official URL/DOI:http://eprints.nmlindia.org/7798
Uncontrolled Keywords:Carbide free bainite, Martensite,Strain induced martensite
Divisions:Metal Extraction and Forming
ID Code:7798
Deposited By:Sahu A K
Deposited On:06 Apr 2018 12:27
Last Modified:06 Apr 2018 12:27
Related URLs:

Repository Staff Only: item control page