Title page for etd-0619116-115854


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URN etd-0619116-115854
Author Chih-yu Chan
Author's Email Address No Public.
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Department Materials and Optoelectronic Science
Year 2015
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Effect of annealing temperature and time on microstructure and tensile properties of a cold-rolled multi-phase medium Mn steel
Date of Defense 2016-07-27
Page Count 195
Keyword
  • Annealing time
  • Annealing temperature
  • Cold rolling
  • Tensile property
  • AHSS
  • Abstract This study explores the effect of cold rolling and intercritical annealing on the microstructure and tensile properties of a medium manganese steel. The effects of annealing time and temperature of intercritical annealing have been studied. It was found that cold rolling followed by 750oC annealing for 10 minutes gave the best tensile properties. 25% and 50% cold roll reduction gave similar tensile properties. When the annealing temperature was increased from 700 to 750oC, more equiaxed grains were formed, and the alloy distribution was homogenized. When the annealing time was increased to 10 hours at 750oC, a lot of athermal martensites were formed. Increasing annealing temperature can give higher fraction of austenite, but the manganese content of austenite grains was decreased, so that caused the decrease of austenite stability.
    Advisory Committee
  • Liu-wen Chang - chair
  • Jui-Fan Tu - co-chair
  • Chih-Pu Chang - advisor
  • Files
  • etd-0619116-115854.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2016-08-03

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