IMECH-IR  > 非线性力学国家重点实验室
Plastic yielding and tensile strength of near-micrometer grain size pure iron
Ruan Q; Yang MX(杨沐鑫); Liu W; Godfrey A
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2019-01-28
Volume744Pages:764-772
ISSN0921-5093
AbstractIn order to investigate the influence on mechanical properties of grain size in the near-micrometer regime, samples of Fe with nearly full density were prepared using the spark plasma sintering (SPS) technique with average grain sizes of 1.0 mu m, 2.6 mu m and 4.0 mu m. In each of these samples the resulting sintered material was in a nearly fully-recrystallized condition with a random texture. The mechanical properties of the samples were examined via tensile testing. A strong dependence of the tensile flow characteristics on the average grain size was observed in this size regime, with the 1.0 mu m grain-size sample showing a very high strength, but no uniform elongation and a large yield drop developed in the 2.6 mu m grain-size sample. Analysis of the grain size dependence of yield strength suggests a positive Hall-Petch deviation from the expected grain boundary strengthening in the SPS Fe samples, assuming a typical range of values for the grain boundary strength (Hall-Petch coefficient). Pre-compression of the 2.6 mu m grain-size prior to tensile testing sample results in a removal of the yield drop and a corresponding large decrease in the yield stress by as much as 145 MPa. The observations suggest that the positive Hall-Petch deviation seen previously in the near-micrometer regime for fully recrystallized Al and Cu may also be present in Fe, and highlight the likely importance of dislocation source hardening in this grain size regime.
KeywordElectron microscopy Stress/strain measurements EBSD Iron alloys Spark plasma sintering
DOI10.1016/j.msea.2018.12.056
Indexed BySCI ; EI
Language英语
WOS IDWOS:000457510300079
WOS KeywordHALL-PETCH SLOPE ; MECHANICAL-PROPERTIES ; FLOW-STRESS ; DEFORMATION ; TEMPERATURE ; ALUMINUM ; ALLOY ; STEEL ; AL ; SUBDIVISION
WOS Research AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS SubjectScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51671113, 51601204]
Classification一类
Ranking2
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78441
Collection非线性力学国家重点实验室
Affiliation1.{Ruan, Qing、Liu, Wei、Godfrey, Andy} Tsinghua Univ, Sch Mat Sci & Engn, Lab Adv Mat MoE, Beijing 100084, Peoples R China
2.{Yang, Muxin} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ruan Q,Yang MX,Liu W,et al. Plastic yielding and tensile strength of near-micrometer grain size pure iron[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,744:764-772.
APA Ruan Q,杨沐鑫,Liu W,&Godfrey A.(2019).Plastic yielding and tensile strength of near-micrometer grain size pure iron.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,744,764-772.
MLA Ruan Q,et al."Plastic yielding and tensile strength of near-micrometer grain size pure iron".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 744(2019):764-772.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Ruan Q]'s Articles
[杨沐鑫]'s Articles
[Liu W]'s Articles
Baidu academic
Similar articles in Baidu academic
[Ruan Q]'s Articles
[杨沐鑫]'s Articles
[Liu W]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Ruan Q]'s Articles
[杨沐鑫]'s Articles
[Liu W]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.