2013
DOI: 10.1590/s1516-14392013005000144
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Abstract: This study focussed on the work hardening behaviour and microstructure of austenitic manganese steel relative to premature failure of crusher jaws. Samples of sound and failed crusher jaws were taken, the change with depth from the working surface to the sample core was measured and their microstructures observed. The study revealed a sharp hardness gradient in the failed crusher jaws, and presence of large carbides at both the austenite grain boundaries and in the austenite matrix. The failure of crusher jaws… Show more

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Cited by 22 publications
(7 citation statements)
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“…It was necessary to ensure there was an austenitic structure at the service temperature of the mill. The austenitic structure was also necessary to ensure hardening during the service of these alloys, as well as being able to present fragile fractures on account of the impact of the mill balls [24].…”
Section: In-service Testsmentioning
confidence: 99%
“…It was necessary to ensure there was an austenitic structure at the service temperature of the mill. The austenitic structure was also necessary to ensure hardening during the service of these alloys, as well as being able to present fragile fractures on account of the impact of the mill balls [24].…”
Section: In-service Testsmentioning
confidence: 99%
“…Homogeneity can be achieved by ensuring that as-cast structure is free from segregation, inclusions and pre-existing cracks; additionally, slow solidification or quenching should be avoided as it leads to carbide precipitation, alloy segregation, dendritic structure and grain growth, which adversely affect the ductility and strength of the Hadfield steel [4]. Olawale et al [19] posited that embrittling carbides present in as-cast structure are removed by solution treatment and quenching.…”
Section: Composition and Heat Treatment Of Austenitic Manganese Steelmentioning
confidence: 99%
“…According to Olawale et al [19], inadequate quenching operations during manufacturing process of the steel leads to the formation of carbide precipitates which embrittle the steel, reduce its ability to withstand shock and create nonuniform plastic flow as the material strain hardens. Also, Curiel-Reyna et al [36] noted that microhardness differences resulted from carbide precipitation arising from post cooling process.…”
Section: Weldability and Failure Of The Hadfield Steelmentioning
confidence: 99%
“…Nowadays, this cast steel is widely used in components exposed to wear under high and dynamic unit pressure, which is due to its tendency of strain hardening generated during the crushing operation. Furthermore, the strengthening mechanism itself is of scientific interest to many research teams [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ].…”
Section: Introductionmentioning
confidence: 99%