Comparison of mechanical properties of martensite/ferrite and bainite/ferrite dual phase 4340 steels

被引：105
作者：
Saeidi, N. [1 ]
Ekrami, A. [1 ]
机构：
[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran, Iran
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 523卷 / 1-2期
关键词：
Dual phase steel; Intercritical annealing; Charpy impact energy; ULTRAHIGH STRENGTH STEEL; TEMPERATURE; IMPROVEMENT; BAINITE;
D O I：
10.1016/j.msea.2009.06.057
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Different microstructures were produced by heat treatment of 4340 steel. These microstructures are bainite, martensite, ferrite-martensite and ferrite-bainite. Mechanical tests were carried out at room temperature. The results showed that steel with bainite-ferrite microstructure has better ductility and charpy impact energy than steels with martensite-ferrite and full bainite microstructures. But yield and tensile strengths of this steel are less than the yield and tensile strengths of the other two steels. Hardness measurements showed that their hardness is the same. Fracture surface observations of tensile specimens showed increase in toughness of bainite-ferrite in comparison to martensite-ferrite and full bainite microstructures. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：125 / 129
页数：5
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