The Effect of Milling Time on the Microstructural Characteristics and Strengthening Mechanisms of NiMo-SiC Alloys Prepared via Powder Metallurgy
Yang, C; Muransky, O; Zhu, HL; Thorogood, GJ; Avdeev, M; Huang, HF; Zhou, XT
2017
发表期刊MATERIALS
ISSN1996-1944
卷号10期号:4页码:-
文章类型期刊论文
摘要A new generation of alloys, which rely on a combination of various strengthening mechanisms, has been developed for application in molten salt nuclear reactors. In the current study, a battery of dispersion and precipitation-strengthened (DPS) NiMo-based alloys containing varying amounts of SiC (0.5-2.5 wt %) were prepared from Ni-Mo-SiC powder mixture via a mechanical alloying (MA) route followed by spark plasma sintering (SPS) and rapid cooling. Neutron Powder Diffraction (NPD), Electron Back Scattering Diffraction (EBSD), and Transmission Electron Microscopy (TEM) were employed in the characterization of the microstructural properties of these in-house prepared NiMo-SiC DPS alloys. The study showed that uniformly-dispersed SiC particles provide dispersion strengthening, the precipitation of nano-scale Ni3Si particles provides precipitation strengthening, and the solid-solution of Mo in the Ni matrix provides solid-solution strengthening. It was further shown that the milling time has significant effects on the microstructural characteristics of these alloys. Increased milling time seems to limit the grain growth of the NiMo matrix by producing well-dispersed Mo2C particles during sintering. The amount of grain boundaries greatly increases the Hall-Petch strengthening, resulting in significantly higher strength in the case of 48-h-milled NiMo-SiC DPS alloys compared with the 8-h-milled alloys. However, it was also shown that the total elongation is considerably reduced in the 48-h-milled NiMo-SiC DPS alloy due to high porosity. The porosity is a result of cold welding of the powder mixture during the extended milling process.
关键词Ultrafine-grained Copper Temperature Composite
DOI10.3390/ma10040389
关键词[WOS]ULTRAFINE-GRAINED COPPER ; TEMPERATURE ; COMPOSITE
收录类别SCI
语种英语
WOS记录号WOS:000402843800064
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28859
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Yang, C,Muransky, O,Zhu, HL,et al. The Effect of Milling Time on the Microstructural Characteristics and Strengthening Mechanisms of NiMo-SiC Alloys Prepared via Powder Metallurgy[J]. MATERIALS,2017,10(4):-.
APA Yang, C.,Muransky, O.,Zhu, HL.,Thorogood, GJ.,Avdeev, M.,...&Zhou, XT.(2017).The Effect of Milling Time on the Microstructural Characteristics and Strengthening Mechanisms of NiMo-SiC Alloys Prepared via Powder Metallurgy.MATERIALS,10(4),-.
MLA Yang, C,et al."The Effect of Milling Time on the Microstructural Characteristics and Strengthening Mechanisms of NiMo-SiC Alloys Prepared via Powder Metallurgy".MATERIALS 10.4(2017):-.
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