Nanoindentation study of ferrite-martensite dual phase steels developed by a new thermomechanical processing

被引：52

作者：

Mazaheri, Yousef ^{[1
,2
]}

Kermanpur, Ahmad ^{[1
]}

Najafizadeh, Abbas ^{[1
]}

机构：

[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran

[2] Bu Ali Sina Univ, Fac Engn, Hamadan 6517838695, Iran

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 639卷

关键词：

Dual phase steel; Thermomechanical processing; Nanoindentation; Mechanical properties; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; LOW-CARBON; VOLUME FRACTION; ELASTIC-MODULUS; HEAT-TREATMENT; MICROSTRUCTURE; DEFORMATION; INDENTATION; BEHAVIOR;

D O I：

10.1016/j.msea.2015.04.098

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Dual phase (DP) steels consisting different volume fractions of ferrite and martensite and different ferrite grain size were produced by a new route utilizing cold-rolling and subsequent intercritical annealing of ferrite/martensite duplex starting structure at 770 degrees C for different times. Scanning electron microscopy has been supplemented by nanoindentation and tensile test to follow microstructural changes and their correlations to the variation in phase's hardness and mechanical properties. The results showed that longer holding times resulted in coarser and softer ferrite grains in DP microstructures. Martensite nanohardness variation with holding time is related to change in its carbon content. Mechanical properties such as strength, elongation and toughness are well correlated with the martensite/ferrite hardness ratio. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：8 / 14

页数：7

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