Effects of microstructure and notches on the mechanical properties of dual-phase steels

被引:108
作者
Bayram, A [1 ]
Uguz, A [1 ]
Ula, M [1 ]
机构
[1] Uludag Univ, Fac Engn & Architecture, TR-16059 Gorukle, Turkey
关键词
D O I
10.1016/S1044-5803(99)00044-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A low-carbon (0.1%) steel has been subjected to three different heat treatments to obtain dual-phase steels with different microstructures. The steel with the intercritically annealed microstructure of equiaxed ferrite-martensite exhibited the highest tensile strength, the lowest ductility, and intermediate fracture toughness properties. Step quenching also produced an equiaxed ferrite-martensite structure, but the material had the worst mechanical properties of the three different heat-treatment conditions. In contrast to the other two heat-treatment conditions, step annealing produced a fibrous (fine, needle-like) ferrite-plus-martensite structure. This gave rise to a material of intermediate tensile strength but with the highest ductility, notch strength, and fracture toughness. It is argued that optimum mechanical properties in a dual-phase steel can best be achieved by obtaining a microstructure containing fine, fibrous needle-like, martensite. (C) Elsevier Science Inc., 1999. All rights reserved.
引用
收藏
页码:259 / 269
页数:11
相关论文
共 26 条
  • [1] BALL A, 1987, MATER SCI TECH SER, V3, P189, DOI 10.1179/026708387790122909
  • [2] THE INFLUENCE OF MARTENSITE SHAPE, CONCENTRATION, AND PHASE-TRANSFORMATION STRAIN ON THE DEFORMATION-BEHAVIOR OF STABLE DUAL-PHASE STEELS
    BHATTACHARYYA, A
    SAKAKI, T
    WENG, GJ
    [J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1993, 24 (02): : 301 - 314
  • [3] THE DEVELOPMENT OF SOME DUAL-PHASE STEEL STRUCTURES FROM DIFFERENT STARTING MICROSTRUCTURES
    CAI, XL
    GARRATTREED, AJ
    OWEN, WS
    [J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1985, 16 (04): : 543 - 557
  • [4] THE DEPENDENCE OF SOME TENSILE AND FATIGUE PROPERTIES OF A DUAL-PHASE STEEL ON ITS MICROSTRUCTURE
    CAI, XL
    FENG, J
    OWEN, WS
    [J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1985, 16 (08): : 1405 - 1415
  • [5] CHANG PH, 1985, ACTA METALL MATER, V33, P897, DOI 10.1016/0001-6160(85)90114-2
  • [6] CHEN WZ, 1989, J VASC MED BIOL, V1, P1
  • [7] YIELD EFFECTS IN AS-QUENCHED, DUAL-PHASE STEELS
    CIMENOGLU, H
    KAYALI, ES
    [J]. SCRIPTA METALLURGICA ET MATERIALIA, 1990, 24 (12): : 2437 - 2442
  • [8] DIETER GE, 1988, MECH METALLURGY, P314
  • [9] HERTZBERG RW, 1989, DEFORMATION FRACTURE, P246
  • [10] MICROSTRUCTURAL EFFECTS OF FATIGUE CRACK-GROWTH IN A 2-PHASE STEEL
    ISHIHARA, T
    [J]. JOURNAL OF MATERIALS SCIENCE, 1983, 18 (01) : 103 - 108