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DC Field | Value | Language |
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dc.contributor.author | Gautam, Monika | - |
dc.date.accessioned | 2025-07-06T11:38:48Z | - |
dc.date.available | 2025-07-06T11:38:48Z | - |
dc.date.issued | 2015-05 | - |
dc.identifier.uri | http://localhost:8081/jspui/handle/123456789/17772 | - |
dc.description.abstract | Interstitial free (IF) steels have excellent formability [plastic anisotropy (rm) ? 1.8 and strain - hardening exponent (n)? 0.221 in light of the nonattendance (low amount) of interstitial atoms (0.005wt% C and 0.009wt% N) in the matrix. Absence (or very low amount) of these elements inhibits very low strength in steel which is non-desirable in automotive industry due to its poor impact resistance, low yield strength, and other mechanical properties. To improve the microstructure and mechanical properties of the steel, 0.005wt% carbon IF steel were systematically optimized by a series of heat treatment processes at various temperatures in GleebleĀ® 3800 thermo mechanical simulator. The processes include annealing, normalizing and water quenching after heating the sample within (a+y) and single phase yregion. The microstructural analyses were performed using X-Ray Diffraction, light optical microscopy and scanning electron microscopy. The formation of carbide phases may not be seen and grain refinement also appears to be negligible within 3-5 min of isothermal holding during heat treatment. However an increase in hardness value of the as-prepared (VI-IN 89) sample to VHN 146 for annealed sample and VHN 173.42 for water quenched under 5 Kg load, raising a further interest that the IF steel may be an important contender for the use in automobile sector, provided microstructure analysis is performed in a systematic way. From the present investigation it is most likely that acicular ferrite formation is the key for the increase in hardness and along with the deformation band a possible signature of the martensitic transformation. | en_US |
dc.description.sponsorship | INDIAN INSTITUTE OF TECHNOLOGY ROORKEE | en_US |
dc.language.iso | en | en_US |
dc.publisher | IIT ROORKEE | en_US |
dc.subject | Interstitial Free (IF) Steels | en_US |
dc.subject | Microstructure | en_US |
dc.subject | Martensitic Transformation | en_US |
dc.subject | Scanning Electron Microscopy | en_US |
dc.title | HIGH STRENGTH AND HIGH DUCTILITY OF IF STEEL FOR AUTOMOBILE APPLICATION | en_US |
dc.type | Other | en_US |
Appears in Collections: | MASTERS' THESES (MMD) |
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File | Description | Size | Format | |
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G24675.pdf | 9.55 MB | Adobe PDF | View/Open |
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