Influence of Heat-Treatment on the Mechanical Properties of Lotus-Type Porous Carbon Steel Fabricated by Continuous Zone Melting Method
Lotus-type porous carbon steel with cylindrical pores was fabricated by a continuous zone melting method under pressurized mixture gases of hydrogen and helium. The microstructure of lotus-type porous steel was analyzed, and the tensile test was carried out. In the case of tensile test of the specimen with the cylindrical pores parallel to the solidification direction, the ultimate tensile strength was lower than the estimated value, but the yield strength was higher than the estimated value. It was assumed that the strength was decreased in proportion to decreasing cross section area of the specimen. The increasing of yield strength was attributed to precipitation strengthening. The influence of heat treatment (Quenching and tempering, normalizing) on the tensile properties was investigated.
Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee
T. Kujime et al., "Influence of Heat-Treatment on the Mechanical Properties of Lotus-Type Porous Carbon Steel Fabricated by Continuous Zone Melting Method", Materials Science Forum, Vols. 486-487, pp. 534-537, 2005