Influence of thermal cycling temperatur on the recrystallization of cold rolled stainless steel 316l

Fahmi Mubarok*, Putri Intan Usi Fauzia, Sutikno, Ferdiansyah Mahyudin, Dwikora Novembri Utomo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

. Investment casting of an orthopedic implant plate based on stainless steel 316L was considered an economical process. Nevertheless, the mechanical properties of the investment casting product were found to be inferior as compared to the implant plate fabricated with other methods such as forging due to their differences in the microstructure. Investment casting mostly produced coarser grain as compared to those with forging or rolled process. In order to improve their mechanical properties, cold-rolling followed by a repetitive thermal cycling process is proposed. The goal is to generate finer grain size through recrystallization process leading to nucleation of new grain during the thermal cycling process thus increasing their strength. Stainless steel 316L was cold-rolled to 52% reduction in thickness and this process generate stored strain energy in the form of dislocation density in the material. The thermal cycling treatment performed within several cycles after cold rolling enabling gradual disperse of stored strain energy that facilitates the recrystallization process that initiates new grain formation. The short holding time within several cycles limits the grain growth that normally occurs during annealing. It was found that thermal cycling treatment at a temperature of 950oC for 35 seconds within four cycles led to the formation of finer grain size of 22 µm on average as compared to the initial investment casting average grain size of 290 µm. The hardness also increases to 253 HV0.3 in this condition as compared to 155 HV0.3 of investment casting products. Lower thermal cycling temperature than 950oC during the test did not result in grain refinement thus indicating that strain energy relieves were not enough to aid the recrystallization process.

Original languageEnglish
Title of host publicationMechanical Engineering
Subtitle of host publicationAdvanced Materials Processing Technology
Editors Suwarno, Vivien Djanali, Fahmi Mubarok, Bambang Pramujati
PublisherTrans Tech Publications Ltd
Pages218-223
Number of pages6
ISBN (Print)9783035716870
DOIs
Publication statusPublished - 2020
Event4th International Conference on Mechanical Engineering, ICOME 2019 - Yogyakarta, Indonesia
Duration: 28 Aug 201929 Aug 2019

Publication series

NameKey Engineering Materials
Volume867 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference4th International Conference on Mechanical Engineering, ICOME 2019
Country/TerritoryIndonesia
CityYogyakarta
Period28/08/1929/08/19

Keywords

  • 316L
  • Cold rolling
  • Implant
  • Investment casting
  • Thermal cycling

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