The Experts below are selected from a list of 234 Experts worldwide ranked by ideXlab platform
Debalay Chakrabarti - One of the best experts on this subject based on the ideXlab platform.
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effect of microstructural parameters microtexture and matrix strain on the charpy impact properties of low carbon hsla steel containing mns inclusions
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2014Co-Authors: A Ghosh, S Sahoo, M Ghosh, R N Ghosh, Debalay ChakrabartiAbstract:Low-carbon micro-alloyed steel containing coarse MnS inclusions was subjected to different thermo-mechanical processing routes to evaluate the effect of microstructure on its Charpy impact properties over a range of Temperatures. MnS inclusions were found to deteriorate the upper shelf energy (USE) of the steel but its effect on the impact transition Temperature was not as detrimental as that due to the presence of TiN particles. MnS inclusions were responsible for the initiation of micro-voids; however, the propagation of the cracks from these depends on the effective grain size and the strength of the matrix. An increase in the density of dislocations and low-angle boundaries enhances the strength and the strain-hardening ability of the ferrite matrix. This helps in retarding the growth of micro-voids, thereby reducing USE and promoting cleavage crack propagation resulting in an increase in its impact transition Temperature. Refinement of effective grain size, on the other hand, increases the crack propagation resistance and therefore, improves the low-Temperature toughness of the steel. Finish rolling of the steel just above the Ar3 Temperature (austenite to ferrite transformation start Temperature) or a simple normalizing treatment of the as-rolled plates at a low Austenitization Temperature is recommended from the point of view of higher impact toughness and lower impact transition Temperature.
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Effect of microstructural parameters, microtexture and matrix strain on the Charpy impact properties of low carbon HSLA steel containing MnS inclusions
Materials Science and Engineering: A, 2014Co-Authors: A Ghosh, S Sahoo, M Ghosh, R N Ghosh, Debalay ChakrabartiAbstract:Low-carbon micro-alloyed steel containing coarse MnS inclusions was subjected to different thermo-mechanical processing routes to evaluate the effect of microstructure on its Charpy impact properties over a range of Temperatures. MnS inclusions were found to deteriorate the upper shelf energy (USE) of the steel but its effect on the impact transition Temperature was not as detrimental as that due to the presence of TiN particles. MnS inclusions were responsible for the initiation of micro-voids; however, the propagation of the cracks from these depends on the effective grain size and the strength of the matrix. An increase in the density of dislocations and low-angle boundaries enhances the strength and the strain-hardening ability of the ferrite matrix. This helps in retarding the growth of micro-voids, thereby reducing USE and promoting cleavage crack propagation resulting in an increase in its impact transition Temperature. Refinement of effective grain size, on the other hand, increases the crack propagation resistance and therefore, improves the low-Temperature toughness of the steel. Finish rolling of the steel just above the Ar3 Temperature (austenite to ferrite transformation start Temperature) or a simple normalizing treatment of the as-rolled plates at a low Austenitization Temperature is recommended from the point of view of higher impact toughness and lower impact transition Temperature.
A Ghosh - One of the best experts on this subject based on the ideXlab platform.
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effect of microstructural parameters microtexture and matrix strain on the charpy impact properties of low carbon hsla steel containing mns inclusions
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2014Co-Authors: A Ghosh, S Sahoo, M Ghosh, R N Ghosh, Debalay ChakrabartiAbstract:Low-carbon micro-alloyed steel containing coarse MnS inclusions was subjected to different thermo-mechanical processing routes to evaluate the effect of microstructure on its Charpy impact properties over a range of Temperatures. MnS inclusions were found to deteriorate the upper shelf energy (USE) of the steel but its effect on the impact transition Temperature was not as detrimental as that due to the presence of TiN particles. MnS inclusions were responsible for the initiation of micro-voids; however, the propagation of the cracks from these depends on the effective grain size and the strength of the matrix. An increase in the density of dislocations and low-angle boundaries enhances the strength and the strain-hardening ability of the ferrite matrix. This helps in retarding the growth of micro-voids, thereby reducing USE and promoting cleavage crack propagation resulting in an increase in its impact transition Temperature. Refinement of effective grain size, on the other hand, increases the crack propagation resistance and therefore, improves the low-Temperature toughness of the steel. Finish rolling of the steel just above the Ar3 Temperature (austenite to ferrite transformation start Temperature) or a simple normalizing treatment of the as-rolled plates at a low Austenitization Temperature is recommended from the point of view of higher impact toughness and lower impact transition Temperature.
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Effect of microstructural parameters, microtexture and matrix strain on the Charpy impact properties of low carbon HSLA steel containing MnS inclusions
Materials Science and Engineering: A, 2014Co-Authors: A Ghosh, S Sahoo, M Ghosh, R N Ghosh, Debalay ChakrabartiAbstract:Low-carbon micro-alloyed steel containing coarse MnS inclusions was subjected to different thermo-mechanical processing routes to evaluate the effect of microstructure on its Charpy impact properties over a range of Temperatures. MnS inclusions were found to deteriorate the upper shelf energy (USE) of the steel but its effect on the impact transition Temperature was not as detrimental as that due to the presence of TiN particles. MnS inclusions were responsible for the initiation of micro-voids; however, the propagation of the cracks from these depends on the effective grain size and the strength of the matrix. An increase in the density of dislocations and low-angle boundaries enhances the strength and the strain-hardening ability of the ferrite matrix. This helps in retarding the growth of micro-voids, thereby reducing USE and promoting cleavage crack propagation resulting in an increase in its impact transition Temperature. Refinement of effective grain size, on the other hand, increases the crack propagation resistance and therefore, improves the low-Temperature toughness of the steel. Finish rolling of the steel just above the Ar3 Temperature (austenite to ferrite transformation start Temperature) or a simple normalizing treatment of the as-rolled plates at a low Austenitization Temperature is recommended from the point of view of higher impact toughness and lower impact transition Temperature.
Bilge Demir - One of the best experts on this subject based on the ideXlab platform.
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transformation characteristics of ductile iron austempered from intercritical austenitizing Temperature ranges
Journal of Materials Science, 2009Co-Authors: Mehmet Erdogan, Volkan Kilicli, Bilge DemirAbstract:In the present work, the transformation characteristics of ductile iron austempered from intercritical Austenitization Temperature ranges were investigated. For this purpose, an unalloyed ductile cast iron containing 3.50 wt% C, 2.63 wt% Si and 0.318 wt% Mn were intercritically austenitized (partially austenitized) at various Temperatures and then rapidly transformed to a salt bath held at the 365 °C for austempering for various times to produce dual matrix structure with different ausferrite volume fractions in ferrite matrix. A microstructure map was created to illustrate the transformation of products quantitatively as a function of austempering time for a particular intercritical and austempering heat treatment Temperature and time. It was demonstrated that the total volume fraction of transformed phases was approximately constant for all austempering times after rapidly transforming samples from a particular intercritical Temperature to austempering Temperature. It was found out that the new ferrite (It is also called epitaxial ferrite) introduced into the intercritically austenitized structure during austempering and its content was dependent on the intercritical austenitizing Temperature and austempering time.
R N Ghosh - One of the best experts on this subject based on the ideXlab platform.
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effect of microstructural parameters microtexture and matrix strain on the charpy impact properties of low carbon hsla steel containing mns inclusions
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2014Co-Authors: A Ghosh, S Sahoo, M Ghosh, R N Ghosh, Debalay ChakrabartiAbstract:Low-carbon micro-alloyed steel containing coarse MnS inclusions was subjected to different thermo-mechanical processing routes to evaluate the effect of microstructure on its Charpy impact properties over a range of Temperatures. MnS inclusions were found to deteriorate the upper shelf energy (USE) of the steel but its effect on the impact transition Temperature was not as detrimental as that due to the presence of TiN particles. MnS inclusions were responsible for the initiation of micro-voids; however, the propagation of the cracks from these depends on the effective grain size and the strength of the matrix. An increase in the density of dislocations and low-angle boundaries enhances the strength and the strain-hardening ability of the ferrite matrix. This helps in retarding the growth of micro-voids, thereby reducing USE and promoting cleavage crack propagation resulting in an increase in its impact transition Temperature. Refinement of effective grain size, on the other hand, increases the crack propagation resistance and therefore, improves the low-Temperature toughness of the steel. Finish rolling of the steel just above the Ar3 Temperature (austenite to ferrite transformation start Temperature) or a simple normalizing treatment of the as-rolled plates at a low Austenitization Temperature is recommended from the point of view of higher impact toughness and lower impact transition Temperature.
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Effect of microstructural parameters, microtexture and matrix strain on the Charpy impact properties of low carbon HSLA steel containing MnS inclusions
Materials Science and Engineering: A, 2014Co-Authors: A Ghosh, S Sahoo, M Ghosh, R N Ghosh, Debalay ChakrabartiAbstract:Low-carbon micro-alloyed steel containing coarse MnS inclusions was subjected to different thermo-mechanical processing routes to evaluate the effect of microstructure on its Charpy impact properties over a range of Temperatures. MnS inclusions were found to deteriorate the upper shelf energy (USE) of the steel but its effect on the impact transition Temperature was not as detrimental as that due to the presence of TiN particles. MnS inclusions were responsible for the initiation of micro-voids; however, the propagation of the cracks from these depends on the effective grain size and the strength of the matrix. An increase in the density of dislocations and low-angle boundaries enhances the strength and the strain-hardening ability of the ferrite matrix. This helps in retarding the growth of micro-voids, thereby reducing USE and promoting cleavage crack propagation resulting in an increase in its impact transition Temperature. Refinement of effective grain size, on the other hand, increases the crack propagation resistance and therefore, improves the low-Temperature toughness of the steel. Finish rolling of the steel just above the Ar3 Temperature (austenite to ferrite transformation start Temperature) or a simple normalizing treatment of the as-rolled plates at a low Austenitization Temperature is recommended from the point of view of higher impact toughness and lower impact transition Temperature.
S Sahoo - One of the best experts on this subject based on the ideXlab platform.
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effect of microstructural parameters microtexture and matrix strain on the charpy impact properties of low carbon hsla steel containing mns inclusions
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2014Co-Authors: A Ghosh, S Sahoo, M Ghosh, R N Ghosh, Debalay ChakrabartiAbstract:Low-carbon micro-alloyed steel containing coarse MnS inclusions was subjected to different thermo-mechanical processing routes to evaluate the effect of microstructure on its Charpy impact properties over a range of Temperatures. MnS inclusions were found to deteriorate the upper shelf energy (USE) of the steel but its effect on the impact transition Temperature was not as detrimental as that due to the presence of TiN particles. MnS inclusions were responsible for the initiation of micro-voids; however, the propagation of the cracks from these depends on the effective grain size and the strength of the matrix. An increase in the density of dislocations and low-angle boundaries enhances the strength and the strain-hardening ability of the ferrite matrix. This helps in retarding the growth of micro-voids, thereby reducing USE and promoting cleavage crack propagation resulting in an increase in its impact transition Temperature. Refinement of effective grain size, on the other hand, increases the crack propagation resistance and therefore, improves the low-Temperature toughness of the steel. Finish rolling of the steel just above the Ar3 Temperature (austenite to ferrite transformation start Temperature) or a simple normalizing treatment of the as-rolled plates at a low Austenitization Temperature is recommended from the point of view of higher impact toughness and lower impact transition Temperature.
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Effect of microstructural parameters, microtexture and matrix strain on the Charpy impact properties of low carbon HSLA steel containing MnS inclusions
Materials Science and Engineering: A, 2014Co-Authors: A Ghosh, S Sahoo, M Ghosh, R N Ghosh, Debalay ChakrabartiAbstract:Low-carbon micro-alloyed steel containing coarse MnS inclusions was subjected to different thermo-mechanical processing routes to evaluate the effect of microstructure on its Charpy impact properties over a range of Temperatures. MnS inclusions were found to deteriorate the upper shelf energy (USE) of the steel but its effect on the impact transition Temperature was not as detrimental as that due to the presence of TiN particles. MnS inclusions were responsible for the initiation of micro-voids; however, the propagation of the cracks from these depends on the effective grain size and the strength of the matrix. An increase in the density of dislocations and low-angle boundaries enhances the strength and the strain-hardening ability of the ferrite matrix. This helps in retarding the growth of micro-voids, thereby reducing USE and promoting cleavage crack propagation resulting in an increase in its impact transition Temperature. Refinement of effective grain size, on the other hand, increases the crack propagation resistance and therefore, improves the low-Temperature toughness of the steel. Finish rolling of the steel just above the Ar3 Temperature (austenite to ferrite transformation start Temperature) or a simple normalizing treatment of the as-rolled plates at a low Austenitization Temperature is recommended from the point of view of higher impact toughness and lower impact transition Temperature.
