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STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL
Li Shijian; Sun Mingyue; Liu Hongwei; Li Dianzhong
Corresponding AuthorLi Dianzhong(dzli@imr.ac.cn)
2011-07-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume47Issue:7Pages:946-953
AbstractBased on the measured stress-strain curves and thermo-physical data of 25Cr2Ni4MoV steel, a FEM model of void closure in heavy forging process was established through ABAQUS software. The void closure behaviors under different hot plasticity conditions have been investigated. The FEM results showed three distinct stages during the void closure. The voids with the same position in a cylindrical specimen close up at a similar height reduction ratio (Delta H/H(0)) around 25% at different temperatures, which indicates that the void closure is not sensitive to the deformation temperature. On basis of the FEM results, a physical-simulated experiment for void bonding process has been performed through compression tests on a hollow cylindrical specimens, with deformation temperatures ranging from 900 V to 1200 degrees C, Delta H/H(0) from 25% to 45% and a constant strain rate 0.01 s(-1). The experimental results have shown that the Delta H/H(0) for the void completely bonded at 1200, 1100 and 1000 degrees C are all about 35%, but increases to 45% when the deformation temperature decreased to 900 degrees C, which confirms that void bonding is a diffusion controlled process. Through the experimental results, it can be further demonstrated the high temperature combined with severe deformation can enhance the ability of atoms transition and decrease the micro-gap between contacted surfaces. Finally, the influencing factors on the bonding efficiency were investigated through SEM observation on the fractured surface of the tensile specimen with internal closed void.
Keywordsteel 25Cr2Ni4MoV forging void healing bonding efficiency simulation
DOI10.3724/SP.J.1037.2011.00157
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000294980700030
PublisherSCIENCE PRESS
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/104350
Collection中国科学院金属研究所
Corresponding AuthorLi Dianzhong
AffiliationChinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Li Shijian,Sun Mingyue,Liu Hongwei,et al. STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL[J]. ACTA METALLURGICA SINICA,2011,47(7):946-953.
APA Li Shijian,Sun Mingyue,Liu Hongwei,&Li Dianzhong.(2011).STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL.ACTA METALLURGICA SINICA,47(7),946-953.
MLA Li Shijian,et al."STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL".ACTA METALLURGICA SINICA 47.7(2011):946-953.
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