The effects of cold deformation on the microstructures and hardness properties of 316L stainless-steel

Ahmad Mawardi, Nurul Sofea (2022) The effects of cold deformation on the microstructures and hardness properties of 316L stainless-steel. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

	Text (24 Pages) The effects of cold deformation on the microstructures and hardness properties of 316L stainless-steel.pdf - Submitted Version Download (843kB)
	Text (Full text) The effects of cold deformation on the microstructures and hardness properties of 316L stainless-steel.pdf - Submitted Version Restricted to Repository staff only Download (2MB)

Abstract

This research discusses mainly on cold deformation impacts on the microstructural transformation and the hardness properties of the studied material which is 316L Stainless Steel. A total of five cold rolled samples were prepared accordingly with thickness reduction percentages increased from 0% to 40%. Microstructural modifications of the CR samples were examined under optical microscope image analyser at 10X magnification and the hardness test was carried out by utilising Vickers Hardness Tester equipped with a 0.5kg test load. From the metallurgical test, the results showed that as the thickness reduction percentage (%RT) increased, the content of martensite formation in 316L Stainless Steel also increased and thus, contributing to the enhancement of strength and reduction in ductility of the material. For the polished sample, the Vickers hardness at 0% RT is 165.9 and was increased to the maximum of 337.9 at 40% RT. As for the unpolished sample, the Vickers hardness at 0% RT is 176.2 and was increased to the maximum of 394.7 at 40% RT. In comparison, the micro-hardness reading of the samples (which was taken directly after cold rolling process) before polishing has slightly higher values than after polishing. From the results obtained, it is found that as the cold rolling reduction percentage increased, the content of martensite increased as well as the hardness properties of the studied material.

Actions (login required)

View Item