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STRUCTURE PROPERTIES RELATIONS HIPS IN HEAT TREATED LOW CARBON S TEEL | ||
| Al-Qadisiyah Journal for Engineering Sciences | ||
| Volume 10, Issue 4, December 2017, Pages 486-495 PDF (1023.75 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.30772/qjes.v10i4.496 | ||
| Author | ||
| Heider Yasser Thamir Alyasiri* | ||
| Materials Engineering Dept., College of Engineering, University of Al-Qadisiyah, AL-Diwaniyah, Iraq | ||
| Abstract | ||
| The samples of AISI 1018 Low carbon steel were heated to austenite zone then cooled in different mediums with different cooling rates. Mechanical tests show increase in hardness, yield strength, tensile strength, modulus of elasticity, and yield/tensile ratio as cooling rate is increase. Ductility has inverse proportionality to cooling rate. The resulting microstructures show decreasing in grains sizes accompanying to cooling rate increase. The relations between mechanical properties and grains size are opposites of relations between mechanical properties with cooling rates. Hardness, yield strength, tensile strength, modulus of elasticity, and yield/tensile ratio increase as grains size decreases, while ductility decreases. | ||
| Keywords | ||
| AISI 1018 steel; Heat treatment; Grain size; Hall-Petch; Cooling rate | ||
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