Development of a high strength high toughness ausferritic steel

被引：47

作者：

Putatunda, Susil K. ^{[1
]}

Singar, Arjun V. ^{[1
]}

Tackett, Ronald ^{[2
]}

Lawes, Gavin ^{[2
]}

机构：

[1] Wayne State Univ, Dept Chem & Mat Sci, Detroit, MI 48202 USA

[2] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 513-14卷

基金：

美国国家科学基金会;

关键词：

Fracture toughness; Austempering; Austenite; Ferrite; Strain hardening exponent; Tensile strength; Ductility; AUSTEMPERED DUCTILE IRON; FRACTURE-TOUGHNESS; SILICON STEELS; HIGH-CARBON; BAINITE; MICROSTRUCTURE; TEMPERATURE; ADI;

D O I：

10.1016/j.msea.2009.02.013

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new ausferritic steel with high strength and exceptionally high fracture toughness has been developed. This steel has been synthesized integrating concepts from Austempered Ductile Cast iron (ADI) technology. The influence of the austempering temperature on the microstructure and mechanical properties of this steel at room temperature and ambient atmosphere has been examined. The effect of microstructure on the plane strain fracture toughness and on the magnetic, electrical, and thermal properties was also investigated. Compact tension and cylindrical tensile specimens prepared from the low alloy medium carbon steel with high silicon content were initially austenitized at 927 degrees C for 2 h and then subsequently austempered at several temperatures between 260 degrees C (500 F) and 400 degrees C (750 F) to produce different microstructures. The microstructures were characterized by X-ray diffraction, scanning electron microscopy and optical metallography. A combination of exceptionally high yield strength (1336 MPa) and a high fracture of toughness of 116 MPa root m (a value comparable to maraging steel) was obtained in this steel after austempering at 316 degrees C (600 F) for 2 h. Potential applications of this steel include the inexpensive fabrication of armored plates and components requiring high reliability and durability. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：329 / 339

页数：11

共 60 条

[21]

Janowak J.F., 1985, AFS Transaction, V88, P123

[22]

Janowak J.F., 1982, AFS International Cast Metal Journal, V6, P28

[23]

JOHANSSON M, 1977, AFS T, V85

[24] TOUGHNESS OF TEMPERED UPPER AND LOWER BAINITIC MICROSTRUCTURES IN A 4150 STEEL [J].

JOHNSON, DR ;

BECKER, WT .

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 1993, 2 (02) :255-263

[25]

KOVACS BV, 1990, MOD CAST, V36, P38

[26]

KRAUSS G, 1987, PRINCIPLES HEAT TREA

[27]

MAYER P, 1986, P 2 INT C AUST DUCT, P171

[28]

Moore D.J., 1985, J HEAT TREATING, V4, P7

[29]

Moore D.J., 1987, Transactions of the American Foundrymen's Society, V87, P165

[30] Use of saturation magnetism measurements to detect martensite formation in austenitic stainless steel after compressive deformation at high temperatures [J].

Mumtaz, K ;

Takahashi, S ;

Echigoya, J ;

Zhang, L ;

Kamada, Y ;

Sato, M .

JOURNAL OF MATERIALS SCIENCE LETTERS, 2002, 21 (15) :1199-1201

← 1 2 3 4 5 6 →