EVALUATION OF ANISOTROPY AND STRAIN HARDENING EXPONENT OF SS304L TAILOR WELDED BLANKS

Authors

  • Omkar Bamane Dept. of Manufacturing Engineering, School of Mechanical Engineering.Vellore Institute of Technology,Vellore, India
  • Parthasarathi N L Metal Forming and Tribology Section, Materials Development and Technology Division, Indira Gandhi Center for Atomic Research, Kalpakkam, India.
  • Arivazhagan N Dept. of Manufacturing Engineering, School of Mechanical Engineering.Vellore Institute of Technology,Vellore, India
  • Utpal Borah Metal Forming and Tribology Section, Materials Development and Technology Division, Indira Gandhi Center for Atomic Research, Kalpakkam, India.

Keywords:

Anisotropy, Strain hardening exponent, SS304L, TIG Welding

Abstract

Computation of planar/normal anisotropy and strain hardening exponent is a key process to evaluate the formability of sheet metals. In this work, a comparative study has been performed between as received and autogenously TIG welded sheets of SS 304L. Uniaxial tensile tests were carried out on along three directions, along (0°), across (90°) and diagonal (45°) to the rolling direction and the corresponding anisotropic values were calculated. Metallography by optical microscope was carried out in order to correlate the tensile test results. Tensile test results show that yield strength (σy) of welded sample was found to be higher than as received samples, whereas the ultimate strength (σu) values have decreased. The higher dislocation density and the relative higher hardness in the weld metal zone is attributed to this mechanical behavior. The normal anisotropy (rm) and strain hardening exponent (n) of the TIG welded samples are found to be greater than values of as received samples.

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Published

2018-06-01

How to Cite

[1]
Omkar Bamane, Parthasarathi N L, Arivazhagan N, and Utpal Borah, “EVALUATION OF ANISOTROPY AND STRAIN HARDENING EXPONENT OF SS304L TAILOR WELDED BLANKS”, JME, vol. 13, no. 2, pp. 082–087, Jun. 2018.

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