| Plastic yielding and tensile strength of near-micrometer grain size pure iron | |
Ruan Q; Yang MX(杨沐鑫) ; Liu W; Godfrey A
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| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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| 2019-01-28 | |
| Volume | 744Pages:764-772 |
| ISSN | 0921-5093 |
| Abstract | In 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. |
| Keyword | Electron microscopy Stress/strain measurements EBSD Iron alloys Spark plasma sintering |
| DOI | 10.1016/j.msea.2018.12.056 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000457510300079 |
| WOS Keyword | HALL-PETCH SLOPE ; MECHANICAL-PROPERTIES ; FLOW-STRESS ; DEFORMATION ; TEMPERATURE ; ALUMINUM ; ALLOY ; STEEL ; AL ; SUBDIVISION |
| WOS Research Area | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| Funding Organization | National Natural Science Foundation of China [51671113, 51601204] |
| Classification | 一类 |
| Ranking | 2 |
| Contributor | Godfrey, A |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/78441 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.{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.Rp_Au:Godfrey, A |
| 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. |
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| Jp2019017.pdf（1846KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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