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Investigations on the tensile deformation of pure Mg and Mg–15Gd alloy by in-situ X-ray synchrotron radiation and visco-plastic self-consistent modeling

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Journal of Magnesium and Alloys 2023年第2期11卷 607-613页

作者： Yuling Xu Yuanding Huang Yuye Wang Weiming Gan Shiwei Wang Emad Maawad norbert schell norbert Hort Chongqing Academy of Science and Technology Chongqing 401123China Institute of Materials Research Helmholtz-Zentrum GeesthachtGeesthacht 21502Germany Shanghai Spaceflight Precision Machinery Institute Shanghai 201600China

In this study,the texture evolutions of two Mg materials during tension are ***-situ X-ray synchrotron and Visco-Plastic SelfConsistent(VPSC) modeling are employed to investigate the different deformation modes between pure Mg and Mg-15Gd(wt.%) *** two materials with a strong extrusion texture show large different slip/twinning activity behaviors during tensile *** basal(a) slip has the highest contribution to the initial stage of plastic deformation for pure *** the subsequent plastic deformation,the prismatic slip is dominant due to the strong ED//(100) fiber *** contrast,the deformation behavior of Mg-15Gd alloy is more *** and basal slip are dominant at the early stage of plastic deformation,but further deformation results in the increased activation of prismatic and pyramidal *** comparison to pure Mg,the ratios of the critical resolved shear stress(CRSS) between non-basal slip and basal slip of the Mg-15Gd alloy are much lower.

关键词： Mg alloy Texture Mechanical behavior In-situ investigation

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Three-Point Bending Test and Crack Detection by Acoustic Emission on Different Spring Steel Wires with Different Crystallographic Textures

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材料科学与工程（中英文A版） 2023年第3期13卷 53-67页

作者： Mathias Lorenz Mohammed Salih Daniela Schwerdt Nowfal Al-Hamdany Emad Maawad norbert schell Eckehard Müller University of Wismar Faculty of Mechanical EngineeringPh.-Müller-Straße 14Wismar D-23966Germany Helmholtz Zentrum Hereon Institute of Materials MechanicsDepartment of Laser Processing and Structural AssessmentMax-Planck Str.1Geestacht D-21502Germany Helmholtz Zentrum Hereon Institute of Materials PhysicsMax-Planck-Str.1Geesthacht D-21502Germany Hochschule Bochum Department of Mechatronics and Mechanical EngineeringAm Hochschulcampus 1Bochum D-44801Germany Steinbeis-Transfercenter of Springtechnology Part behaviour und ProcessLangerfeldstr.53 cIserlohn D-58638Germany

In the production of compression springs,high forming velocities and grades of deformation during winding and setting may induce cracks that can lead to failure causing risks of an accident and *** AE(acoustic emission)technology,a non-destructive monitoring method,can detect acoustic signals reflected from *** establish this method in the production of technical springs,it was necessary,to find out whether the AE signal is influenced by material properties,phase fractions distribution from tempered martensite,retained austenite,and microstructure including crystallographic *** addition,it was investigated to what extent the detected AE signal can be useful to separate between an actual crack and other material *** an in-situ three-point bending test with the AE technology,macro-and micro-crack-typical AE signals were detected for five different spring steel wires(SH,VDSiCr,and FDSiCr according to EN-10270-1 and EN-10270-2).The relative energy related to the initiation,propagation,and growth of cracks caused by mechanical stress was measured using a piezoelectric *** a crack AE signal appeared for the first time,the bending tests were stopped *** results show that the frequency spectrum combined with the intensity of the acoustic signals generated during crack growth depends on the material properties and the crystallographic ***,it could be shown that it is possible to differentiate between micro-crack-typical AE signals and other signals that result from different material responses.

关键词： Technical springs AE analysis micro-computer tomography texture

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基于同步辐射研究轧制AA 7020铝合金织构梯度及其引起的力学性能各向异性

基于同步辐射研究轧制AA 7020铝合金织构梯度及其引起的力学性能...

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第十四届全国物理力学学术会议

作者：钟政烨孙光爱张昌盛王虹李建 BROKMEIER Heinz-Günter schell norbert 中国工程物理研究院核物理化学研究所德国克劳斯塔尔工业大学材料科学与工程学院

7000系铝合金轧制板材常出现力学性能的各向异性,即沿不同方向呈现出不同的屈服强度、极限拉伸应力(UTS)和断裂时的延伸率。我们运用同步辐射高能X射线研究高强铝合金AA 7020轧制板各向异性的原因。首先,研究了沿板材法线方向的织构梯...

7000系铝合金轧制板材常出现力学性能的各向异性,即沿不同方向呈现出不同的屈服强度、极限拉伸应力(UTS)和断裂时的延伸率。我们运用同步辐射高能X射线研究高强铝合金AA 7020轧制板各向异性的原因。首先,研究了沿板材法线方向的织构梯度和由此引起的各向异性。从板表面到板中心5个区域的研究结果表明,沿板法线方向存在显著的织构梯度。基于

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The GYF domain protein CD2BP2 is critical for embryogenesis and podocyte function

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Journal of Molecular Cell Biology 2015年第5期7卷 402-414页

作者： Gesa I.Albert Christoph schell Karin M.Kirschner Sebastian Schafer Ronald Naumann Alexandra Muller Oliver Kretz Benno Kuropka Mathias Girbig norbert Hubner Eberhard Krause Holger Scholz Tobias B.Huber Klaus-Peter Knobeloch Christian Freund Institute for Chemistry and Biochemistry Freie Universitat Berlin14195 BerlinGermany Leibniz-Institut fuer Molekulare Pharmakologie 13125 BerlinGermany Renal Division University Hospital Freiburg79106 FreiburgGermany Speman Graduate School for Medicine and Biology University of Freiburg79106 FreiburgGermany Faculty of Biology University Freiburg79106 FreiburgGermany Institute fuer Vegetative Physiologie Charité-Universitatsmedizin Berlin10117 BerlinGermany Experimental Genetics and Cardiovascular Diseases MDC13125 BerlinGermany Transgenic Core Facility Max-Planck-Institute of Molecular Cell Biology and GeneticsDresdenGermany Institute of Neuropathology University of Freiburg79106 FreiburgGermany Institute of Cell Biology&Anatomy University of Freiburg79106 FreiburgGermany BIOSS Centre for Biological Signaling Studies Albert-Ludwigs-University79106 FreiburgGermany

Scaffolding proteins play pivotal roles in the assembly of macromolecular machines such as the *** adaptor protein CD2BP2,originally identified as a binding partner of the adhesion molecule CD2,is a pre-spliceosomal assembly factor that utilizes its glycine-tyrosine-phenylalanine(GYF)domain to co-localize with spliceosomal *** far,its function in vertebrates is *** conditional gene targeting in mice,we show that CD2BP2 is crucial for embryogenesis,leading to growth retardation,defects in vascularization,and premature death at embryonic day 10.5 when *** of the protein in bone marrow-derived macrophages indicates that CD2BP2 is involved in the alternative splicing of mRNA transcripts from diverse *** the molecular level,we identified the phosphatase PP1 to be recruited to the spliceosome via the N-terminus of *** the strong expression of CD2BP2 in podocytes of the kidney,we use selective depletion of CD2BP2,in combination with next-generation sequencing,to monitor changes in exon usage of genes critical for podocyte functions,including VEGF and actin ***2BP2-depleted podocytes display foot process effacement,and cause proteinuria and ultimately lethal kidney failure in ***,our study defines CD2BP2 as a non-redundant splicing factor essential for embryonic development and podocyte integrity.

关键词： GYF domain CD2BP2 alternative splicing PP1 podocytes VEGF

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