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Comparison of the characteristics of nanocrystalline ferrite in Fe-0.89C steels with pearlite and spheroidite structure produced by ball milling
Xu, Y; Umemoto, M; Tsuchiya, K
Corresponding AuthorXu, Y()
2002-09-01
Source PublicationMATERIALS TRANSACTIONS
ISSN1345-9678
Volume43Issue:9Pages:2205-2212
AbstractNanocrystalline ferrite formation by ball milling in Fe-0.89C steels with initial pearlite and spheroidite microstructures and their annealing behaviors have been studied through microstructural observation and microhardness measurement. It was found that nanocrystalline ferrite first forms near the surface of powders due to localized severe deformation. The microhardness of nanocrystalline ferrite regions is much higher than that of work-hardening regions. The dissolution of cementite was observed together with the nanocrystallization of ferrite. The nanocrystallization rate of pearlite powder is faster than that of spheroidite powder due to higher work-hardening rate and smaller cementite size. After long time ball milling, the equiaxed nanocrystalline ferrite with less than 10 nm grain size forms in the whole powders of both pearlite and spheroidite structures, and the cementite dissolves completely. By annealing the milled pearlite and spheroidite powders, recrystallization was observed in the work-hardening regions, while continuous grain growth was observed in the nanocrystalline ferrite region. After annealing, microhardness of the former nanocrystalline ferrite region is always higher than that of the former work-hardening region when compared at the same annealing condition. The grain growth rate of nanocrystalline ferrite produced from pearlite structure is lower than that of spheroidite structure due to the finer grains.
Keywordball milling pearlite spheroidite nanocrystalline ferrite deformation cementite dissolution annealing grain growth
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000178449800010
PublisherJAPAN INST METALS
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/115270
Collection中国科学院金属研究所
Corresponding AuthorXu, Y
Affiliation1.Chinese Acad Sci, Met Res Inst, Shenyang 110015, Peoples R China
2.Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan
Recommended Citation
GB/T 7714
Xu, Y,Umemoto, M,Tsuchiya, K. Comparison of the characteristics of nanocrystalline ferrite in Fe-0.89C steels with pearlite and spheroidite structure produced by ball milling[J]. MATERIALS TRANSACTIONS,2002,43(9):2205-2212.
APA Xu, Y,Umemoto, M,&Tsuchiya, K.(2002).Comparison of the characteristics of nanocrystalline ferrite in Fe-0.89C steels with pearlite and spheroidite structure produced by ball milling.MATERIALS TRANSACTIONS,43(9),2205-2212.
MLA Xu, Y,et al."Comparison of the characteristics of nanocrystalline ferrite in Fe-0.89C steels with pearlite and spheroidite structure produced by ball milling".MATERIALS TRANSACTIONS 43.9(2002):2205-2212.
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