Effect of Pre-Strain on Micro-Structural Behavior and Mechanical Properties of a Medium Carbon Steel
dc.contributor.advisor | Chauhan, Sakshi | |
dc.contributor.author | Yadav, Shailesh | |
dc.date.accessioned | 2024-08-22T11:18:24Z | |
dc.date.available | 2024-08-22T11:18:24Z | |
dc.date.issued | 2023-07 | |
dc.description.abstract | The aim of this experimental work was to investigate the “Effect of Pre-Strain on Micro-Structural Behavior and Mechanical Properties of a Medium Carbon Steel”. The specimens were austenized for soaking time of 4 hours at temperatures 1100°C and 900°C, then quenched in water. Specimens are subjected pre-strain value 0%, 4%, 7% and 10% of elongation for tensile test before tempering. Then specimens were tempered at temperatures 500°C and 300°C for soaking time 2 hours and cooled in air. After cooling tensile test and hardness test were performed. Tempering and cooling rate have been proven to affect and improve the micro-structure and mechanical properties of medium carbon steel (MCS). Thus, tempering is employed to get desirable qualities of MCS such as increased toughness, ductility or removal of residual stresses. The changes in mechanical behavior as compared with untreated specimens are explained in terms of changes in UTS, Yield strength, hardness, elongation, ASTM number and grain size. Results show that the mechanical Characteristics can be changed and improved by tempering for a particular application. It was also found that the Yield strength and UTS decreases as grain size increases with increase in deformation. UTS and hardness increases by increasing pre-strain value while deformation decreases. Hardness of specimen increased after quenching. To reduce this hardness tempering process was applied and specimen became tougher. With the increase in grain size the percentage elongation also increase. MCS changes from ferrite and pearlite structure to austenite structure when heated over critical temperature. Sudden quenching in water changes its structure austenite to martensite structure. Also the structure of steel is changed by tempering. Some of the extra carbon atoms that were bound in the crystal lattice during quenching have been released during tempering. As a result, tiny, finely scattered carbide particles precipitate within the steel matrix. These carbides prevent dislocations from moving, increasing the steel's strength and hardness. | |
dc.identifier.citation | Theses of M. Tech | |
dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810213595 | |
dc.keywords | Mechanical Properties | |
dc.language.iso | English | |
dc.pages | 63 p. p. | |
dc.publisher | G. B. Pant University of Agriculture & Technology, Pantnagar-263145 | |
dc.relation.ispartofseries | 10870 | |
dc.sub | Mechanical Engineering | |
dc.theme | Academic Research | |
dc.these.type | M.Tech. | |
dc.title | Effect of Pre-Strain on Micro-Structural Behavior and Mechanical Properties of a Medium Carbon Steel | |
dc.type | Thesis |
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