Damaging micromechanisms in ferritic-pearlitic ductile cast irons

被引：80

作者：

Iacoviello, F. ^{[1
]}

Di Bartolomeo, O. ^{[1
]}

Di Cocco, V. ^{[1
]}

Piacente, V. ^{[1
]}

机构：

[1] Univ Cassino, DiMSAT, I-03043 Cassino, FR, Italy

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 478卷 / 1-2期

关键词：

ductile iron; damage micromechanisms;

D O I：

10.1016/j.msea.2007.05.110

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microstructure influences on damaging mechanisms in ferritic-pearlitic ductile cast irons (DCIs) were investigated. Four different ferrite/pearlite volume fractions were considered, and in situ scanning electron microscope observations were performed during step by step tensile tests in a microtensile holder. SEM observations allowed to identify an evident microstructure influence on ferritic-pearlitic DCls damaging mechanisms and the key role played by graphite constituents. Phase volume fractions and distribution affect both crack initiation and crack propagation. The importance of the damage mechanism based on graphite nodules-matrix interface cracking, usually indicated as the most relevant, is only partially confirmed, depending on the DO microstructure. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：181 / 186

页数：6

共 20 条

[1] Local approach of damage and fracture toughness for nodular cast iron [J].