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Microstructure evolution and mechanical behavior of Ni-rich Ni-Mn-Ga alloys under compressive and tensile stresses

Journal of Materials Science & Technology 2022年第2期97卷 113-122页

作者： Yue Wang Siyuan Yang Ting Zhou Long Hou Lansong Ba yves Fautrelle Zhongming Ren Yanyan Zhu Zongbin Li Xi Li State Key Laboratory of Advanced Special Steels Shanghai UniversityShanghai 200072China Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming Shanghai Jiao Tong UniversityShanghai 200240China EPM-Madylam ENSHMG BP 38402St Martin d’Heres CedexFrance School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Anisotropy and Texture of Materials Northeastern UniversityShenyang 110819China

The microstructure evolution and mechanical behavior in directionally solidified Ni-rich Ni-Mn-Ga alloys with nominal compositions of Ni_(58)Mn_(25)Ga_(17) and Ni_(60)Mn_(25)Ga_(15) under compressive and tensile stresses have been *** composition distribution shows the element Ni segregates in gamma phase,while elements Mn and Ga segregate in martensite ***,the microstructure orientation examined by electron backscatter diffraction(EBSD)indicates that beta phase has a preferred growth orientation of(001)_(A) in Ni_(58)Mn_(25)Ga_(17) alloys,while gamma phase has a preferred growth orientation of(001)_(γ) in Ni_(60)Mn_(25)Ga_(15) *** fracture morphology suggests that the existence of ductile y phase can reduce the crack propagation and promote fracture strain,particularly in the Ni_(60)Mn_(25)Ga_(15) ***,Schmid factor and deformation gradient tensor were calculated to well explain the crystallographic evolution during the detwinning under compressive and tensile *** present findings not only elucidate the mechanism ofγphase on the mechanical behavior of Ni-rich Ni-Mn-Ga alloys,but also shed light on the composition design of high temperature Ni-Mn-Ga shape memory alloys.

关键词： Ni-Mn-Ga Gamma phase Tensile Compressive EBSD

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A systematic review of metabolism of methionine sources in animals:One parameter does not convey a comprehensive story

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Animal Nutrition 2023年第2期13卷 31-49页

作者： Philippe Becquet Mercedes Vazquez-Anon yves Mercier Karen Wedekind Tahir Mahmood Dolores I.Batonon-Alavo Frances Yan International Methionine Analogue Association Regus Brussels City CentreStephanie SquareAvenue Louise65B-1050 BrusselsBelgium Novus International Inc. 20 Research Park DriveSaint CharlesMissouri 63304USA Adisseo France SAS Antony Parc II10 Place Du General de GaulleAntony 92160France

The goal of this review article,based on a systematic literature search,is to critically assess the state of knowledge and experimental methodologies used to delineate the conversion and metabolism of the 2 methionine(Met)sources DL-methionine(DL-Met)and DL-2-hydroxy-4-(methylthio)butanoic acid(HMTBa).The difference in the chemical structures of HMTBa and DL-Met indicates that these molecules are absorbed and metabolized differently in *** review explores the methodologies used to describe the 2-step enzymatic conversion of the 3 enantiomers(D-HMTBa,L-HMTBa and D-Met)to L-Met,as well as the site of conversion at the organ and tissue *** work was published documenting the conversion of HMTBa and D-Met into L-Met and,consequently,the incorporation into protein using a variety of in vitro techniques,such as tissue homogenates,cell lines,primary cell lines,and everted gut sacs of individual *** studies illustrated the role of the liver,kidney,and intestine in the con-version of Met precursors into L-Met.A combination of in vivo studies using stable isotopes and infusions provided evidence of the wide conversion of HMTBa to L-Met by all tissues and how some tissues are net users of HMTBa,whereas others are net secreters of L-Met derived from *** of D-Met to L-Met in organs other than the liver and kidney is poorly *** methodology cited in the literature to determine conversion efficiency ranged from measurements of urinary,fecal,and respiratory excretion to plasma concentration and tissue incorporation of isotopes after intraperitoneal and oral *** observed between these methodologies reflect differences in the metabolism of Met sources rather than differences in conversion *** factors affecting conversion efficiency are explored in this paper and are mostly associated with extreme dietary conditions,such as noncommercial crystalline diets that are very deficient in total sulfur amino a

关键词： DL-Methionine Hydroxy-analog of methionine 2-Hydroxy-4-(methylthio)butanoic acid Conversion Metabolism Methodology

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Absorption of methionine sources in animals-is there more to know?

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Animal Nutrition 2023年第1期12卷 159-170页

作者： Philippe Becquet Mercedes Vazquez-Anon yves Mercier Dolores I.Batonon-Alavo Frances Yan Karen Wedekind Tahir Mahmood IMAA BrusselsBelgium Novus International Saint CharlesMissouriUSA Adisseo France SAS AntonyFrance

This literature review evaluates the absorption of methionine (Met) sources such as 2-hydroxy-4-methylthiobutyric acid (HMTBa), its calcium salts (HMTBa-Ca), and DL-methionine (DL-Met) by focusing on the state of knowledge regarding the absorption mechanism, experimental methodology, and factors affecting their absorption. The 2 Met sources differ in mechanism and site of absorption due to differences in their chemical characteristics and enzymatic conversion. This review addresses diffusion- and transport-mediated absorption systems for amino acids and carboxylic compounds, best elucidated by in vitro, ex vivo, and in vivo experimental models. Opportunities and limitations in the use of radioisotopes to depict absorption sites as well as host and microbial metabolism are described. Physiological and environmental conditions that lead to changes in gut absorptive capacity and the impact of Met source absorption are also evaluated. This review concludes that any comparison between HMTBa and DL-Met should consider their different behaviors during the absorption phase. Hence, the chemical characteristics of these 2 molecules entail different absorption sites and mechanisms, from passive absorption in the case of HMTBa and HMTBa-Ca to active transporters for DL-Met, HMTBa, and HMTBa-Ca. In addition, the different conversion modes of these 2 molecules further differentiate their absorption modes. Considering these important differences, it is easier to understand the apparent divergence between the conclusions of existing publications. When comparing these 2 molecules, it is recommended to properly adapt to the conditions under which the absorption of Met sources is evaluated.

关键词： DL-Methionine Hydroxy-analog of methionine 2-Hydroxy-4-methylthiobutyric acid AbsorptionM ethodology

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Optical gravitational wave detectors on the ground and in space:theory and technology

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Research in Astronomy and Astrophysics 2010年第10期10卷 956-1004页

作者： Jean-yves Vinet ARTEMIS Observatoire de la Cte d'Azur Université de Nice-Sophia Antipolis 06304 NICE France

Major predictions of General Relativity, unforeseen at the beginning of the preceding century, are now under investigation. The existence of black holes of any mass from tens to billions of solar masses is now established, and the physics around these objects begins to be studied through direct observations in a wide electromagnetic spectrum from visible light to X-rays. General relativity, however, provides an extra medium which carries more information on the regions of intense gravitational field, namely gravitational waves （GWs）. Due to their extremely weak coupling to matter, GWs are precisely generated in those regions of spacetime undergoing strong curvature, which is very exciting for modern astrophysics. On the other hand, this weak coupling makes it difficult for GWs to cause appreciable effects in human made instruments. This is why technology of GW detectors took such a long time to reach a sensitivity level consistent with GW amplitudes predicted by theoretical models of sources. In the present status, apart from resonant solid detectors, two large interferometric antennas （LIGO in the USA and the French-Italian Virgo） are beginning to produce data, and a joint ESA-NASA space mission, resulting from a wide effort of European and American groups, is reaching a crucial approval phase. The aim of the present review is to give the theoretical bases of GW detectors using light.

关键词： gravitation -- gravitational waves -- interferometry

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Microstructural,crystallographic,and mechanical characteristics in Ni-Mn-Ga alloys directionally solidified under a transverse magnetic field

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Journal of Materials Science & Technology 2023年第11期142卷 10-21页

作者： Xi Li Long Hou Siyuan Yang Ting Zhou Yue Wang Xing Yu Zongbin Li Daoyong Cong yves Fautrelle Zhongming Ren Yanyan Zhu Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Special Steels Shanghai UniversityShanghai 200072China Key Laboratory for Anisotropy and Texture of Materials Northeastern UniversityShenyang 110819China Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China EPM-Madylam ENSHMG BPSt Martin d’Heres 38402 CEDEXFrance

In this study,the effect of transverse magnetic field-assisted directional solidification(MFADS)on the microstructures in Ni-Mn-Ga alloys has been *** results show that the magnetic field is capable of inducing transversal macrosegregation perpendicular to the magnetic field,causing the emergence of martensite clusters in the austenite ***,the magnetic field alleviates the microseg-regation on a dendritic scale and promotes the preferred growth of austenite *** the basis of the above investigation,several special samples are designed using the MFADS to study the crystallographic evolution and mechanical behavior during thermal/stress-induced martensite *** martensite cluster in the austenite matrix is used to investigate the martensite transformation and growth under cooling-heating *** crystallographic relationship and phase boundary microstructure between martensite and austenite have been *** addition,the microsegregation on a dendritic scale can significantly influence the martensite variant distribution,corresponding to the performance during compressive circles based on the analysis of the deformation gradient *** stress-induced superelasticity is closely dependent on orientation,well explained from the perspective of different resolved shear stress factors and correspondence variant pair formation transformation *** crystallographic evolution has been characterized during in-situ stress-induced *** findings not only deepen the understanding of martensite transformation and mechanical behavior under a thermal/stress field in Ni-Mn-Ga alloys but also propose a promising strategy to obtain microstructure-controllable functional alloys by MFADS.

关键词： Magnetic field-assisted directional solidification Segregation Orientation Martensite transformation Superelasticity

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***: a materials informatics web app platform for materials discovery and survey of state-of-the-art

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npj Computational Materials 2022年第1期8卷 605-616页

作者： Jianjun Hu Stanislav Stefanov Yuqi Song Sadman Sadeed Omee Steph-yves Louis Edirisuriya M.D.Siriwardane Yong Zhao Lai Wei Department of Computer Science and Engineering University of South Carolina550 Assembly StreetColumbiaSC29201USA Department of Physics University of ColomboPO Box 1490Colombo 00300Sri Lanka

The availability and easy access of large-scale experimental and computational materials data have enabled the emergence of accelerated development of algorithms and models for materials property prediction,structure prediction,and generative design of ***,the lack of user-friendly materials informatics web servers has severely constrained the wide adoption of such tools in the daily practice of materials screening,tinkering,and design space exploration by materials *** we first survey current materials informatics web apps and then propose and develop ***,a web-based materials informatics toolbox for materials discovery,which includes a variety of routinely needed tools for exploratory materials discovery,including material’s composition and structure validity check (*** neutrality,electronegativity balance,dynamic stability,Pauling rules),materials property prediction (*** gap,elastic moduli,hardness,and thermal conductivity),search for hypothetical materials,and utility *** user-friendly tools can be freely accessed at http://*** argue that such materials informatics apps should be widely developed by the community to speed up materials discovery processes.

关键词： Atlas web prediction

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Surface movement above old coal longwalls after mine closure

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International Journal of Mining Science and Technology 2017年第3期27卷 481-490页

作者： André Vervoort Pierre-yves Declercq Department of Civil Engineering KU Leuven Leuven 3001 Belgium Geological Survey of Belgium Royal Belgian Institute of Natural Sciences Brussels 1000 Belgium

Although most subsidence occurs in the months and years after mining by the longwall method, surface movement is still occurring many decades after the mining. The aim of the study is to quantify the long term behavior. Satellite data(radar-interferometry) were analyzed to study an area of about 2 km^2 during the 18 years following the closure of the underground infrastructure and the flooding of the underground workings and rock mass. It was observed that, on average, a residual downward movement took place till 7–12 years after the closure, followed by a clear uplift. However, the first signs of an uplift occurred in certain sub-areas 3–4 years after the closure. Zones within the area studied were identified with either larger or smaller movements. However, the spatial variation of the surface subsidence or uplift could not be directly explained by the characteristics of mining.

关键词： Coal mining Surface movement Subsidence Uplift Radar-interferometry

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Post-translational Regulation of SPX Proteins for Coordinated Nutrient Signaling

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Molecular Plant 2019年第8期12卷 1041-1043页

作者： yves Poirier Department of Plant Molecular Biology University of Lausanne1015 LausanneSwitzerland

Proteins containing an SPX domain are involved in numerous aspects of phosphate homeostasis and the response to phosphate ***4 is known to bind to the transcription factor PHR2 in the presenee of inositol polyphosphate,affecting its ability to activate the expression of phosphate-starvation-induced (PSI) *** have evolved mechanisms to coordinate the uptake and utilization of phosphate and *** recent works (Hu et al.,2019;Ruan et al.,2019) have identified different E3 ubiquitin ligases that mediate the degradation of SPX4 under either phosphate-deficient conditions or nitrate-replete *** studies highlight the potential of SPX proteins,E3 ubiquitin ligases,and inositol polyphosphate to regulate distinet nutrient signaling pathways in a coordinated fashion.

关键词： Post-translational Regulation SPX Proteins Coordinated Nutrient Signaling phosphate-starvation-induced(PSI)

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Upward surface movement above deep coal mines after closure and flooding of underground workings

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International Journal of Mining Science and Technology 2018年第1期28卷 53-59页

作者： André Vervoort Pierre-yves Declercq Department of Civil Engineering KU Leuven Geological Survey of Belgium Royal Belgian Institute of Natural Sciences

After the mass closures of entire coal mine districts in Europe at the end of the last century, a new phenomenon of surface movement was observed—an upward *** most surface movement(i.e., subsidence) occurs in the months and years after mining by the longwall method, surface movement still occurs many decades after mining is *** the closure and flooding of underground excavations and surrounding rock, this movement was *** paper focuses on quantifying the upward movement in two neighboring coal mines(Winterslag and Zwartberg, Belgium).The study is based on data from a remote sensing technique: interferometry with synthetic aperture radar(INSAR).The results of the study show that the rate of upward movement in the decade after closure is about 10 mm/year on *** upward movements are not linked directly to the past exploitation directly underneath a *** amounts of subsidence at specific locations are linked mainly to their positions relative to an inverse trough shape situated over the entire mined-out areas and their immediate *** features, such as geological faults, can have a secondary effect on the local variation of the *** processes of subsidence and uplift are based on completely different *** is initiated by a caving process, while the process of uplift is clearly linked to flooding.

关键词： Coal mining Surface movement Subsidence Uplift Radar-interferometry

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Beijing,My Second Hometown

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China News Release 2022年第5期 32-35页

作者： yves Mouillet the French Channel of CGTN China Media Group

I had the chance to receive an international education in my *** the fact that I am of French nationality,my mother of Polish origin always tried to speak to us in Polish,to open a window to the world for us and give us an international vision that is not confined to France,our native *** is undoubtedly one of the reasons why I became interested in China from an early age.

关键词： doubt speak mother

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