Jang, Yoon Soo Phaniraj, M. P. Kim, Dong-Ik Shim, Jae-Hyeok Huh, Moo-Young 2024-01-20T19:00:35Z 2024-01-20T19:00:35Z 2021-09-05 2010-08 1073-5623 https://pubs.kist.re.kr/handle/201004/131219 Hypereutectoid steels with 0, 0.69, 1.29, and 1.95 wt pct aluminum were prepared. The samples were hot rolled at 1100 A degrees C followed by cooling in air. The microstructure of the as-rolled samples was characterized using field emission-scanning electron microscopy (FE-SEM). The electron backscattered diffraction (EBSD) technique was used to identify the grain boundary phases. The steels have a pearlitic microstructure with different amounts of grain boundary cementite. A continuous grain boundary cementite network is present in the 0 wt pct Al steel. Grain boundary cementite formation is completely suppressed in the 1.29 wt pct Al steel. Phase diagram calculations show that aluminum increases the eutectoid temperature. However, the interlamellar spacing and pearlite colony size decrease with increase in aluminum content. Dilatometry measurements show that aluminum addition increases the undercooling below the eutectoid temperature. The yield strength increases with the decrease in interlamellar spacing and colony size. Very high ultimate tensile strengths (1200 to 1400 MPa) and improved elongations to failure (7 to 9 pct) are achieved in the as-rolled condition. English SPRINGER CARBON-STEELS TRANSFORMATION TEMPERATURE PEARLITE PRECIPITATION HARDENABILITY AUSTENITE CEMENTITE STRENGTH Effect of Aluminum Content on the Microstructure and Mechanical Properties of Hypereutectoid Steels Article 10.1007/s11661-010-0233-3 1 METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, v.41A, no.8, pp.2078 - 2084 METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 41A 8 2078 2084 scie scopus 000279086600022 2-s2.0-84858151280 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article CARBON-STEELS TRANSFORMATION TEMPERATURE PEARLITE PRECIPITATION HARDENABILITY AUSTENITE CEMENTITE STRENGTH CARBON-STEELS TRANSFORMATION TEMPERATURE PEARLITE HARDENABILITY STRENGTH