Influence of austenitizing temperature on microstructure and mechanical properties of austempered gray iron (AGI). (2017)

• Record Type: Journal Article
• Authors: Sarkar, Tanmoy; Sutradhar, Goutam
• Is Part Of: Materials today. Volume 4:Number 9(2017)
• Page Start: 10138
• Page End: 10143
• Publication Date: 2017
• Subjects: Austenitizing temperature -- Microstructure -- Mechanical properties -- Alloyed; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2017.06.336
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: This study is about finding the effect of austenitizing temperature on microstructure and mechanical properties of copper alloyed austempered gray iron (AGI), and then comparing it with an as cast (solidified) state. Round cylindrical tensile and impact test (charpy) specimens were prepared from as-cast gray iron material as per ASTM standards. These specimens were then austenitized at different temperatures and then austempered at a fixed austempering temperature. Its microstructure was characterized through optical microscopy, scanning electron microscope (SEM) and X-ray diffraction analysis. Mechanical properties of all these austempered materials were determined and co-related with the microstructure. Fracture surfaces of charpy impact specimen were examined under SEM to determine the fracture mode. The test results indicate that the austenitizing temperature has significant effect on resultant microstructure and mechanical properties of austempered material.