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SUPERVISOR
MohammadReza Toroghinejad,Aboozar Taherizadeh
محمدرضا طرقي نژاد (استاد راهنما) ابوذر طاهري زاده (استاد راهنما)
 
STUDENT
Morteza Ghaedi
مرتضي قائدي

FACULTY - DEPARTMENT

دانشکده مهندسی مواد
DEGREE
Master of Science (MSc)
YEAR
1395

TITLE

Fabrication and Characterization of the High Entropy Alloy, FeCrNi2Cu in vacuum arc melting method and investigation of mechanical properties after recrystallization anneal
In the present study, the FeCrNi 2 Cu High Entropy Alloy (HEA) was produced by Vacuum Arc Re melting of high purity (99%) raw materials. The XRD pattern showed single FCC phase rich by Ni and minor (less than 5%) Cu rich phase in grains boundary. In order to investigation of chemical composition, microstructure and morphology, of FeCrNi2Cu, X-Ray diffraction and scanning electron microscopy have been used. Then, produced alloy were hot rolled, cold rolled and annealed and after that, the microstructure and morphology of samples were investigated. Afterwards, tensile test, micro hardness, and shear paunch test have been carried out.. It has been found that, the hardness of cold rolled sample was more than casted and annealed samples. The micro hardness of 98% cold rolled sample was more than two times of as cast sample. Also shear paunch results indicated that, yield and ultimate strength of 98% cold rolled samples was 2.83 times more than the as cast samples. Recrystallization process was modeled with Minitab software by using area under engineering stress-strain curve based on time and temperature factors then, temperature- time regression equation was extracted. It was found that, optimal annealing time and temperature for maximum stress-strain area was 100 minutes and 970 ? c. Keywords: High Entropy Alloy, Vacuum Arc Melting, Hot Roll, Cold Roll, Mechanical Properties,
در اين پژوهش آلياژ آنتروپي بالا FeCrNi 2 Cu با استفاده از روش ذوب قوسي تحت خلاء و مواد اوليه با خلوص 99درصد توليد شد. نتايج آزمون پراش پرتو ايکس اين آلياژ نشان داد که ساختار اين آلياژ داراي تک فاز FCC غني از نيکل و مقادير جزئي (کمتر از 5 درصد) فاز غني از مس در مرزدانه­ها است

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