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Hot ductility and deformation behavior of C-Mn/Nb-microalloyed steel related to cracking during continuous casting

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Abstract
Hot ductility studies have been performed on C-Mn and C-Mn-Nb steels with an approach to simulate the effect of cooling conditions experienced by steel in secondary cooling zone during continuous casting. Thermal oscillations prior to tensile straining deteriorate hot ductility of steel by deepening and widening the hot ductility trough. C-Mn steels are found to exhibit ductility troughs in three distinct zones whereas C-Mn-Nb steel shows drop in ductility only at low temperature in the vicinity of ferrite transformation temperatures. Start of ferrite transformation in steels causes yield ratio to increase while work hardening rates and strength coefficient decrease with decrease in test temperature in presence of thermal oscillation prior to tensile testing. Inhibition of recrystallization due to build-up of AlN particles along with the presence of MnS particles in structure and low work hardening rates causes embrittlement of steel in austenitic range. Alloying elements enhancing work hardening rates in austenitic range can be promoted to improve hot ductility. The presence of low melting phase saturated with impurities along the austenitic grain boundaries causes intergranular fracture at high temperature in C-Mn steels.
Keywords
CARBON-STEELS, THERMAL HISTORY, TENSILE TEST, hot ductility, cracking in continuous casting, deformation behavior, TEMPERATURE, NB, STRENGTH, CYCLE, TI

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MLA
Lanjewar, Harishchandra et al. “Hot Ductility and Deformation Behavior of C-Mn/Nb-microalloyed Steel Related to Cracking During Continuous Casting.” JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 23.10 (2014): 3600–3609. Print.
APA
Lanjewar, H., Tripathi, P., Singhai, M., & Patra, P. (2014). Hot ductility and deformation behavior of C-Mn/Nb-microalloyed steel related to cracking during continuous casting. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 23(10), 3600–3609.
Chicago author-date
Lanjewar, Harishchandra, Pranavkumar Tripathi, M Singhai, and PK Patra. 2014. “Hot Ductility and Deformation Behavior of C-Mn/Nb-microalloyed Steel Related to Cracking During Continuous Casting.” Journal of Materials Engineering and Performance 23 (10): 3600–3609.
Chicago author-date (all authors)
Lanjewar, Harishchandra, Pranavkumar Tripathi, M Singhai, and PK Patra. 2014. “Hot Ductility and Deformation Behavior of C-Mn/Nb-microalloyed Steel Related to Cracking During Continuous Casting.” Journal of Materials Engineering and Performance 23 (10): 3600–3609.
Vancouver
1.
Lanjewar H, Tripathi P, Singhai M, Patra P. Hot ductility and deformation behavior of C-Mn/Nb-microalloyed steel related to cracking during continuous casting. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE. NEW YORK, NY 10013 USA: SPRINGER; 2014;23(10):3600–9.
IEEE
[1]
H. Lanjewar, P. Tripathi, M. Singhai, and P. Patra, “Hot ductility and deformation behavior of C-Mn/Nb-microalloyed steel related to cracking during continuous casting,” JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, vol. 23, no. 10, pp. 3600–3609, 2014.
@article{7251621,
  abstract     = {Hot ductility studies have been performed on C-Mn and C-Mn-Nb steels with an approach to simulate the effect of cooling conditions experienced by steel in secondary cooling zone during continuous casting. Thermal oscillations prior to tensile straining deteriorate hot ductility of steel by deepening and widening the hot ductility trough. C-Mn steels are found to exhibit ductility troughs in three distinct zones whereas C-Mn-Nb steel shows drop in ductility only at low temperature in the vicinity of ferrite transformation temperatures. Start of ferrite transformation in steels causes yield ratio to increase while work hardening rates and strength coefficient decrease with decrease in test temperature in presence of thermal oscillation prior to tensile testing. Inhibition of recrystallization due to build-up of AlN particles along with the presence of MnS particles in structure and low work hardening rates causes embrittlement of steel in austenitic range. Alloying elements enhancing work hardening rates in austenitic range can be promoted to
improve hot ductility. The presence of low melting phase saturated with impurities along the austenitic grain boundaries causes intergranular fracture at high temperature in C-Mn steels.},
  author       = {Lanjewar, Harishchandra and Tripathi, Pranavkumar and Singhai, M  and Patra, PK},
  issn         = {1059-9495},
  journal      = {JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE},
  keywords     = {CARBON-STEELS,THERMAL HISTORY,TENSILE TEST,hot ductility,cracking in continuous casting,deformation behavior,TEMPERATURE,NB,STRENGTH,CYCLE,TI},
  language     = {eng},
  number       = {10},
  pages        = {3600--3609},
  publisher    = {SPRINGER},
  title        = {Hot ductility and deformation behavior of C-Mn/Nb-microalloyed steel related to cracking during continuous casting},
  url          = {http://dx.doi.org/10.1007/s11665-014-1151-0},
  volume       = {23},
  year         = {2014},
}

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