Jena, P S M and Rai, R K and Sahu, J K (2018) Improvement of toughness of high chromium white cast iron: duplex ferritic-austenitic matrix. Journal Materials Science and Technology, 34(4) (IF-5.040). pp. 299-304.
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It is attempted to enhance the impact toughness of industrially used high chromium white cast iron (WCI) without sacrificing wear resistance. The microstructure is engineered by cyclic annealing to obtain features such as duplex grain matrix, where austenite envelops ferrite grain, refined M7C3 carbide. The newly cast and heat-treated alloy shows remarkable impact toughness i.e. 13J with improved wear resistance. The fracture micro-mechanism is studied through extensive scanning electron microscopy and it is ascertained that enhanced impact toughness results from crack arrest at duplex grain boundaries. A few other toughness enhancing features are also discussed. The results are compared with standard ASTM grade Class-III high chromium WCI and are found to be encouraging.
|Uncontrolled Keywords:||White cast iron, duplex grain, impact toughness, fracture, wear;Cleavage Cracking; Abrasion Resistance; Fracture-Toughness; Grain-Boundary; Heat-Treatment; Alloy; Microstructure|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||20 Sep 2019 10:08|
|Last Modified:||20 Sep 2019 10:08|
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