Journal of Metastable and Nanocrystalline Materials最新文献_第5页

Microstructure Evolution and Mossbauer Spectroscopy Research of Nanostructured Ni3 Fe Intermetallic 纳米结构ni3fe金属间化合物的微观结构演变及穆斯堡尔光谱研究

Journal of Metastable and Nanocrystalline Materials Pub Date : 2021-04-01 DOI: 10.4028/www.scientific.net/JMNM.32.1

A. Kaibi, A. Guittoum, N. Souami, M. Kechouane

{"title":"Microstructure Evolution and Mossbauer Spectroscopy Research of Nanostructured Ni3 Fe Intermetallic","authors":"A. Kaibi, A. Guittoum, N. Souami, M. Kechouane","doi":"10.4028/www.scientific.net/JMNM.32.1","DOIUrl":"https://doi.org/10.4028/www.scientific.net/JMNM.32.1","url":null,"abstract":"Nanocrystalline Ni75Fe25 (Ni3Fe) powders were prepared by mechanical alloying process using a vario-planetary high-energy ball mill. The intermetallic Ni3Fe formation and different physical properties were investigated, as a function of milling time, t, (in the range 6 to 96 h range), using X-Ray Diffraction (XRD) and Mössbauer Spectroscopy techniques. X-ray diffraction were performed on the samples to understand the structural characteristics and get information about elements and phases present in the powder after different time of milling. The refinement of XRD spectra revealed the complete formation of fcc Ni (Fe) disordered solid solution after 24 h of milling time, the Fe and Ni elemental distributions are closely correlated. With increasing the milling time, the lattice parameter increases and the grains size decreases. The Mössbauer experiments were performed on the powders in order to follow the formation of Ni3Fe compound as a function of milling time. From the adjustment of Mössbauer spectra, we extracted the hyperfine parameters. The evolution of hyperfine magnetic field shows that the magnetic disordered Ni3Fe phase starts to form from 6 h of milling time and grow in intensity with milling time. For the milling time more than 24 h, only the Ni3Fe disordered phase is present with a mean hyperfine magnetic field of about 29.5 T. The interpretation of the Mossbauer spectra confirmed the results obtained by XRD.","PeriodicalId":177608,"journal":{"name":"Journal of Metastable and Nanocrystalline Materials","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124061589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of the Influence of the V in the Zr2Fe Alloy from Hydrogen Storage on Thermodynamic Properties 储氢Zr2Fe合金中V对热力学性能影响的研究

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-15 DOI: 10.4028/www.scientific.net/JMNM.31.22

Alejandro Martínez, D. Peña, D. Bellon

引用次数: 3

The Application of the Hybrid Method the Powder-Laser-Casting Technology for Production of Porous Alloys Based on Aluminum 粉末-激光复合铸造技术在铝基多孔合金生产中的应用

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-15 DOI: 10.4028/www.scientific.net/JMNM.31.11

V. Lykhoshva, L. Savina, V. Savin, A. Tymoshenko

引用次数: 1

Crystallochemistry of Amorphous State in Ni(Co, Fe)-Nb(V, Ta, Mo+Zr) Alloy Systems Ni(Co, Fe)-Nb(V, Ta, Mo+Zr)合金体系中非晶态的晶体化学

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-01 DOI: 10.4028/www.scientific.net/JMNM.31.1

V. Savin, L. Savina, V. Semina, V. Semin, N. P. D’yakonova

引用次数: 0

Features of Amorphization of the Fe-TM-Nd-REM-B Alloys System at Melt Quenching by Gas Atomization Fe-TM-Nd-REM-B合金熔体雾化淬火非晶化特征

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-01 DOI: 10.4028/www.scientific.net/JMNM.31.51

M. Sorokovikov, V. Savin, L. Savina, V. Chaika, I. S. Zherebcov

{"title":"Features of Amorphization of the Fe-TM-Nd-REM-B Alloys System at Melt Quenching by Gas Atomization","authors":"M. Sorokovikov, V. Savin, L. Savina, V. Chaika, I. S. Zherebcov","doi":"10.4028/www.scientific.net/JMNM.31.51","DOIUrl":"https://doi.org/10.4028/www.scientific.net/JMNM.31.51","url":null,"abstract":"Gas atomization powders (GAP) chemical composition which corresponds to the first area of the phase equilibrium, and the fraction that ensures a cooling rate of a separate powder particle of more than 103K/s contains an amorphous component of two types: the first (AC1) has a chemical composition similar to that of the alloy; and the second (AC2) has a chemical composition of the triple eutectic. AC1 is mostly localized on the surface of the powder particles (in the form of layers, shells, nodules) or are detected in the whole volume of the spherical powder particles with its size less than 5 μm. The authors hold that during gas atomization, powder particles of this size have a cooling rate ≥ 105 K/s. Alloys having a similar chemical composition at similar cooling rates are also amorphized by quenching from the liquid state. This proves that an amorphous alloy of the first type is formed directly from a supercooled melt. While AC2 (enriched by Nd) is formed on the border or in the between the crystal phase Fe14Nd2B of the remaining (after primary crystallization during the primary phase) melt enriched by the moment of the solidification of Nd.","PeriodicalId":177608,"journal":{"name":"Journal of Metastable and Nanocrystalline Materials","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132331567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Development and Characterisation of New Biocompatible Sn-Mg Lead-Free Solder 新型生物相容性锡镁无铅焊料的研制与表征

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-01 DOI: 10.4028/www.scientific.net/JMNM.31.6

M. Ďurišin, J. Ďurišin, O. Milkovič, A. Pietrikova, K. Saksl

{"title":"Development and Characterisation of New Biocompatible Sn-Mg Lead-Free Solder","authors":"M. Ďurišin, J. Ďurišin, O. Milkovič, A. Pietrikova, K. Saksl","doi":"10.4028/www.scientific.net/JMNM.31.6","DOIUrl":"https://doi.org/10.4028/www.scientific.net/JMNM.31.6","url":null,"abstract":"This work is focused on a development and research of a new lead-free Sn-Mg solder, alloy compatible with the human body. Tin and magnesium are biocompatible elements which do not cause an inflammation or allergic reactions with living tissues. We have prepared the Sn97Mg3 solder (wt. %) by a rapid solidification of its melt on a copper wheel (melt-spinning technique). This solder may find applications in electronic devices for intracorporeal utilisation. The microstructure of the prepared solder exhibits a heterogeneous distribution of the SnMg2 intermetallic particles within the β-Sn matrix. Structure of the solder was studied by an in-situ high energy X-ray diffraction experiment (energy of an X-ray photon: 60 keV) where 2D XRD patterns were collected from the sample in the temperature range from 298 K to 566 K. The experiment was performed at a high brilliance 3rd generation synchrotron source of radiation (PETRA III storage ring, DESY, Hamburg, Germany) at the P02 undulator beamline. From the measured X-ray diffraction data by applying the Rietveld refinement technique we have obtained thermal volume expansion data, mean positions of atoms as well as isotropic atomic displacement parameters of the constituent SnMg2 and the β-Sn crystalline phases. Thermal behaviour was studied by differential scanning calorimetry at heating rates of 5, 15, 30 and 60 K.min-1 and compared with the measured X-ray data. Our main goal lies in a preparation of a lead-free solder with fine grain structure made exclusively of biocompatible elements. We demonstrated that the rapid melt solidification technique leads to in an improvement and better thermal stability of this alloy.","PeriodicalId":177608,"journal":{"name":"Journal of Metastable and Nanocrystalline Materials","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126083597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of the Superelastic and Structural Characteristics of β-Ti Alloys by Strain-Controlled Cycling after Thermomechanical Processing and Subsequent Ageing 热处理和时效后应变控制循环表征β-Ti合金的超弹性和组织特性

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-01 DOI: 10.4028/www.scientific.net/JMNM.31.43

V. Sheremetyev, M. Ijaz, A. Kudryashova, A. Konopatsky, S. Prokoshkin, V. Brailovski

{"title":"Characterization of the Superelastic and Structural Characteristics of β-Ti Alloys by Strain-Controlled Cycling after Thermomechanical Processing and Subsequent Ageing","authors":"V. Sheremetyev, M. Ijaz, A. Kudryashova, A. Konopatsky, S. Prokoshkin, V. Brailovski","doi":"10.4028/www.scientific.net/JMNM.31.43","DOIUrl":"https://doi.org/10.4028/www.scientific.net/JMNM.31.43","url":null,"abstract":"In this comparative study, the structural and superelastic characteristics of two thermomechanically treated metastable Ti-Nb based (Ti-22Nb-6Zr) and Ti-Zr based (Ti-18Zr-14Nb and Ti-18Zr-13Nb-2Ta (at. %)) alloy systems were studied. To study the influence of room temperature storage on the functional properties of these two alloy systems, the alloys were subjected to a multistage testing routine consisting of four ten-cycle loading-unloading testing series alternated with three room temperature ageing periods (1, 5 and 20 days). Based on microstructure-properties relationships, it was shown that for each alloy system, the forward stress-induced martensitic transformation was essentially dependent on the material microstructure, whereas the subsequent reverse martenstic transformation was controlled by the material composition. The Ti-Zr based alloys demonstrated more stable functional behavior than their Ti-Nb based counterparts. More specifically Ti-18Zr-13Nb-2Ta, subjected to a combination of cyclic training alternated with room temperature ageing showed a significant improvement in superelastic behavior with small accumulated strains and narrow stress hysteresis.","PeriodicalId":177608,"journal":{"name":"Journal of Metastable and Nanocrystalline Materials","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122634678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Zr on Structure and Resistance to Intergranular Corrosion of Severely Deformed 2024 Aluminum Alloy Zr对严重变形2024铝合金组织及抗晶间腐蚀性能的影响

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-01 DOI: 10.4028/www.scientific.net/JMNM.31.35

S. Krymskiy, R. Ilyasov, E. Avtokratova, O. Sitdikov, A. Khazgalieva, M. Markushev

引用次数: 0

Analysis of the Stress-Strained State of Billets Processed by Rotary Forging with Special Shape of the Tool 刀具特殊形状回转锻造坯料应力-应变状态分析

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-01 DOI: 10.4028/www.scientific.net/JMNM.31.16

R. Asfandiyarov, G. Raab, D. Aksenov

引用次数: 2

Effect of Hydrogen Redistribution during Aging on the Martensitic Transformation and Superelasticity of Nanocrystalline TiNi Alloy 时效过程中氢重分布对纳米晶TiNi合金马氏体相变和超弹性的影响

Journal of Metastable and Nanocrystalline Materials Pub Date : 2019-01-01 DOI: 10.4028/www.scientific.net/JMNM.31.30

A. Baturin, A. Lotkov, V. Grishkov, I. Rodionov, D. Zhapova

引用次数: 2