Investigation of the variations in microstructure and mechanical properties of dual-matrix ductile iron by Magnetic Barkhausen Noise analysis

被引：6

作者：

Gur, C. Hakan ^{[1
]}

Ozer, Melika ^{[2
]}

Erdogan, Mehmet ^{[2
]}

机构：

[1] Middle E Tech Univ, Dept Mat & Met Engn, TR-06531 Ankara, Turkey

[2] Gazi Univ, Fac Tech Educ, Met Educ Dept, Div Mat, Ankara, Turkey

来源：

RESEARCH IN NONDESTRUCTIVE EVALUATION | 2008年 / 19卷 / 01期

关键词：

dual matrix ductile iron; magnetic Barkhausen noise analysis; microstructure;

D O I：

10.1080/09349840701635278

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The variations in the microstructure and tensile properties of dual-matrix ductile irons have been investigated non-destructively by Magnetic Barkhausen Noise (MBN) method. Specimens have been intercritically austenitised at 795 degrees C and 815 degrees C for 20 minutes, and then oil-quenched to obtain different martensite volume fractions. Two specimens, namely as-cast and oil-quenched from 900 degrees C, were prepared for comparison purpose. To investigate the effect of tempering, some specimens were tempered at 500 degrees C for 1 h and 3 h. The results showed that there is a good correlation between MBN response and variations in microstructure and mechanical properties. The volume fraction of martensite can be controlled to modify the mechanical properties, and all changes in the microstructure can be nondestructively monitored by MBN.

引用

页码：44 / 60

页数：17

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