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Study of The Effect of Strain Rate on Cold Deformation Behavior and Mechanical Properties of 304L Austenitic Stainless Steel

Mahmoudi, Alireza | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55639 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Serajzadeh, Siamak; Karimi Taheri, Ali
  7. Abstract:
  8. The stiffness rate of the 300 series austenitic stainless steel has long been known to depend on the stability of the austenite and its susceptibility to martensite formation. In this project, the cold deformation of austenitic stainless steel (304L) and the occurrence of martensite deformation during it are studied. Experimental cold rolling experiments under different strain velocities and initial temperatures in the range of -10° C to 25° C; Performed and microstructure, mechanical properties and percentage of martensite generated in rolled steel are determined and evaluated employing different testing techniques. mathematical modeling of cold rolling operation is also performed using Abaqus/Explicit to estimate the distribution of equivalent plastic strain and temperature rise during rolling.It is worth noting that for microstructural and mechanical studies; Optical metallography and scanning electron microscopy, XRD, tensile and hardness tests will be used. In the next phase of the project, the steel is subjected to uniaxial deformation at ambient temperature, during which the percentage of martensite generated in the deformed steel is measured and compared with the rolled specimens. Thus, with the help of the results and microstructural studies, the effect of strain path on the occurrence of martensite state change will be studied.
  9. Keywords:
  10. Stainless Steel ; Strain Rate ; Cold Rolling ; Mechanical Properties ; 304 Austenitic Stainless Steel ; Yield Stress

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