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Influence of thermal exposure on microstructure evolution and tensile fracture behaviors of compacted graphite iron
Qiu, Y.; Pang, J. C.; Li, S. X.; Yang, E. N.; Fu, W. Q.; Liang, M. X.; Zhang, Z. F.; Pang, JC; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2016-05-10
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume664Pages:75-85
AbstractThe mechanical properties of compacted graphite iron (CGI) may undergo degradation when it exposes at high temperature environment for a long period of time. In this study, the influences of thermal exposure conditions on microstructure evolution, tensile properties, especially in-situ tensile fracture behaviors of CGI were investigated. The experimental results show that the cementite surrounding the vermicular graphite (VG) gradually decomposes into ferrite and graphite with increasing the thermal exposure time. The increase of ferrite content with lower strength but higher ductility around VG particles, and the size and content of VG particles can lead to the easier initiation of crack, decrease of strain hardening rate, and the retard of the crack propagation rate in the matrix. All these factors often cause the decrease of strength but increase of elongation to fracture for CGI. Finally the relationship among yield strengths of CGI and matrix, and graphite content was discussed. (C) 2016 Elsevier B.V. All rights reserved.
description.department[qiu, y. ; pang, j. c. ; li, s. x. ; yang, e. n. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [fu, w. q. ; liang, m. x.] china res & dev acad machinery equipment, 10 chedaogou st, beijing 100083, peoples r china
KeywordCompacted Graphite Iron Thermal Exposure In-situ Tensile Testing Microstructure Evolution Fracture Mechanism
Subject AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC) [51331007]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75878
Collection中国科学院金属研究所
Corresponding AuthorPang, JC; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Qiu, Y.,Pang, J. C.,Li, S. X.,et al. Influence of thermal exposure on microstructure evolution and tensile fracture behaviors of compacted graphite iron[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,664:75-85.
APA Qiu, Y..,Pang, J. C..,Li, S. X..,Yang, E. N..,Fu, W. Q..,...&Zhang, ZF .(2016).Influence of thermal exposure on microstructure evolution and tensile fracture behaviors of compacted graphite iron.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,664,75-85.
MLA Qiu, Y.,et al."Influence of thermal exposure on microstructure evolution and tensile fracture behaviors of compacted graphite iron".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 664(2016):75-85.
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