abnormal extrusion texture and reversed yield asymmetry in

Yuanding HUANG Senior Scientist phD Helmholtz

An extruded MgY-Sm-Zn-Zr alloy exhibited an abnormal texture component,that is,the c-axis of most grains was aligned parallel to the extrusion direction.The reversed yield asymmetry with a Wenlong XIAO Professor (Associate) PhD Beihang An extruded MgY-Sm-Zn-Zr alloy exhibited an abnormal texture component,that is,the c-axis of most grains was aligned parallel to the extrusion direction.The reversed yield asymmetry with a The influence of extrusion temperature on the structures Sep 02,2020 abnormal extrusion texture and reversed yield asymmetry in#0183;Li X Q,Cheng C L,Le Q C,Zhou X,Liao Q Y,Chen X R,Jia Y H and Wang P 2019 Ex-situ EBSD analysis of yield asymmetry,texture and twinning development in Mg5Li3Al2Zn alloy during tensile and compressive deformation J.Alloys Compd.805 94756.Crossref Google Scholar

The E ect of Reversed Loading Conditions on the

Figure 3 shows inverse pole gures in the extrusion direction which is also the testing direction.The ini-tial texture of the extruded material exhibits a typical 1010 1120 texture with a higher intensity near the 1010 -pole.Such a texture is often found in magne-sium extrusionsTensile and compressive deformation behavior of peak-aged Aug 04,2016 abnormal extrusion texture and reversed yield asymmetry in#0183;Prog Nat Sci Mater 22:364 of the reversed yield asymmetry in Mg-rare earth alloys at [13] Kwak TY,Lim HK,Kim WJ (2015) Hot compression high temperature.Acta Mater 92:265277 characteristics and processing maps of a cast Mg9.5Zn [28] Wang H,Boehlert CJ,Wang QD,Yin DD,Ding WJ (2016) 2.0Y alloy with icosahedral quasicrystalline phase.Review Article Influence of Grain Size and Texture on the Influence of Grain Size and Texture on the Yield Strength of reverse extruding employing Ram B,(e) end of Ram B involvement,and (f) nal extrusion to obtain a rod [ ].Advances in Materials Science and Engineering report an increase in the yield strength.es e abnormal

Recent publications Physical Metallurgy IMDEA Materials

Understanding the high temperature reversed yield asymmetry in a Mg-rare earth alloy by slip trace analysis.Authors C.M.Cepeda-Jim abnormal extrusion texture and reversed yield asymmetry in#233;nez,C.Prado-Mart abnormal extrusion texture and reversed yield asymmetry in#237;nez,M.T.P abnormal extrusion texture and reversed yield asymmetry in#233;rez-Prado; Journal Acta Materialia; Year,Volume(Issue),Pages 145 (2018) 264-277Previous123456NextInfluence of Grain Size and Texture on the Yield Strength The abnormal decrease in yield strength of the SPD refined Mg alloys has been attributed to the modification of the texture.It is known that the grains of as-extruded Mg alloy in a hard orientation with low Schmid factor,that is,the basal plane slip,are difficult to be activated.Precompressed and Heat-Treated MgZnCa AlloyThe extrusion process for receiving a round bar with 10 mm diameter (extrusion ratio 1:25) was carried out either at 300 C with an extrusion speed of 0.6 mm/s to produce a very ne-grained microstructure or at 400 C with varied extrusion speeds of 0.5,3.4 and 6.6 mm/s,respectively,to achieve

Precipitation strengthening and reversed yield stress

Search text.Search type Research Explorer Website Staff directory.Alternatively,use our AZ indexOrigin of the reversed yield asymmetry in Mg-rare earth Jun 15,2015 abnormal extrusion texture and reversed yield asymmetry in#0183;This paper aims to clarify the origin of the reversed yield asymmetry observed during high temperature deformation of an extruded Mg1 wt.% Mn1 wt.% Nd (MN11) alloy,exhibiting equiaxed grains with an average size of about 14 m and a very broad distribution of the basal planes along the extrusion direction (ED).Modeling and Characterization of Texture Evolution in shear.Grain renement,imperfect strain reversal,and material asymmetry are proposed to be responsible for the occurrence of strain reversal texture in TE.Eects of the non-random initial texture on the microstructure and texture evolution are also discussed.DOI 10.1007/s11661-015-3298-1

Microstructure,Deformation,and Property of Wrought

Oct 10,2020 abnormal extrusion texture and reversed yield asymmetry in#0183;Pure magnesium (Mg) develops a strong basal texture after conventional processing of hot rolling or extrusion.Consequently,it exhibits anisotropic mechanical properties and is difficult to form at room temperature.Adding appropriate alloying elements can weaken the basal texture or even change it,but the improvement in formability and mechanical properties is still far from expectations.Materials Science and Engineering A - SYNLF.Yang et al./ Materials Science and Engineering A 528 (2011) 22312238 2233 Fig.4.{0002} pole gures of (a) GW123k alloy and (b) AZ31 alloy [10] in their as-received states with ED of the extrusion direction and TD of the transverse direction.Fig.5.Uniaxial tensile and compressive stressstrain curves for (a) GW123k alloy and (b) AZ31 alloy.Materials Free Full-Text Reducing Yield Asymmetry Grain-size reduction,precipitation strengthening,and texture weakening are all proven to be effective in decreasing yield asymmetry between tension and compression [10,11,12,16,19,25,26,27,28,29,30,31,32,33,34,35,36,37].For instance,Barnett et al.[] found that the grain size affects yield stress and the sensitivity of twinning to grain size is obviously bigger than that

Influence of Continuous Bending Process on Texture

Moreover,the (0002) pole figure of MgMnCe alloy developed a splitting of pronounced basal texture.The mechanical properties were different due to different angles between c-axis and loading direction (0 abnormal extrusion texture and reversed yield asymmetry in#176;,45 abnormal extrusion texture and reversed yield asymmetry in#176; and 90 abnormal extrusion texture and reversed yield asymmetry in#176;) in the tensile tests.This significantly induces an asymmetry in the yield behavior.Incidence and development of zygotes exhibiting abnormal May 25,2009 abnormal extrusion texture and reversed yield asymmetry in#0183;The incidences of 1PN and 3PN zygotes were 2.9% and 0.4%,respectively.Both types of abnormal zygote showed slower day 3 cleavage,although only the 1PNs exhibited higher fragmentation and asymmetry compared with controls.The 1PN zygotes had a 6.4% implantation rate and viable pregnancy rate of 1.3%.Frontiers Introducing a High Performance Mg-Based The C/T ratio in Mg MCA was measured to be 0.9 (~1) (Table 2 and Figure 2A) exhibiting nearly symmetric yield strength under tension and compression as compared to Mg and wrought Mg alloys with C/T ratio between 0.5 and 0.7 showing asymmetric yield strengths.A minimal yield asymmetry is often looked for material selection in transportation sector.

FMNL3 regulates FASCIN for actin-mediated spindle

The meiotic spindle migrates from the center region to the cortex,and this is a key process in asymmetric division .This asymmetry is critical for oocytes to retain most maternal stores for embryonic development .Spindle migration relies on cytoplasmic actin dynamics [27,28].Due to the effects of FMNL3 on cytoplasmic actin in this study Efficient rolling texture predictions and texture Using the texture measured from a foil in the final recrystallized state,coefficients of the thermal expansion and elastic stiffness tensors were calculated using a thermo-elastic self-consistent model,and the anisotropic yield loci and flow curves along the RD,TD,and ND were predicted using the VPSC code.},doi = {10.1016/j.jnucmat.2017.08 Effects of Pre-Strain on the Evolution of Microstructure reduction,the strength improved and yield asymmetry was weakened.Xu et al.8 conducted multidirectional pre-compression along three directions of magnesium blocks,the tension-compression asymmetry reduced.Lou et al.9 carried out dynamic plastic pre-deformation along the rolling direction at a smaller degree,the ductility improved largely.

DIGITAL.CSIC Effect of volume fraction and particlesize

The extrusion texture prevents deformation by the basal slip system in both tension and compression.Deformation in the twinning system is only possible in compression.As the volumefraction of yttria particles increases,the texture becomes more random and the tension/compression asymmetry tends to decrease and is eventually reversed.Cyclic Deformation Behavior of a Rare-Earth Containing La can work as eective texture modiers for Mg alloys,and they are able to produce the so-called RE texture component even at low alloying levels.[1820,23,26,27,33] Recent studies reported that due to certain RE concen-trations and extrusion parameters there was a shift in the orientation peak of the extrusion textures in Cyclic Characterisation and Plasticity Modelling of AM30 The JV energy model is proven to yield better life predictions.Moreover,multiaxial fatigue characteristics of AM30 Mg alloy extrusion are studied through fully-reversed strain-controlled cyclic experiments including pure torsional and combined axial-torsional at 0,45 and 90 abnormal extrusion texture and reversed yield asymmetry in#176; phase angle shifts.

Cited by 6Publish Year 2019Author Shaoyuan Lyu,Ruixiao Zheng,Wenlong Xiao,Yuanding Huang,Serge Gavras,Norbert Hort,Guodong Li,CAbnormal extrusion texture and reversed yield asymmetry in

The reversed yield asymmetry with a tension/compression of 0.94 was attributed to the activation of extension twinning under tensile strain.Discover the world's research 19+ million membersCited by 3Publish Year 2020Author Xueze Jin,Wenchen Xu,Zhongze Yang,Can Yuan,Debin Shan,Bugang Teng,Bo Cheng JinGuodong LI PhD Student PhD candidate Beihang An extruded MgY-Sm-Zn-Zr alloy exhibited an abnormal texture component,that is,the c-axis of most grains was aligned parallel to the extrusion direction.The reversed yield asymmetry with aCited by 28Publish Year 2016Author Reza Alizadeh,Reza Mahmudi,Alfonso H.W.Ngan,Terence G.LangdonAnalysis of abnormal texture formation and strengthening May 15,2020 abnormal extrusion texture and reversed yield asymmetry in#0183;The abnormal extrusion texture with abnormal extrusion texture and reversed yield asymmetry inlt;0001 abnormal extrusion texture and reversed yield asymmetry ingt; //ED in the Mg-Gd-Y-Zn-Zr magnesium alloy was the result of continuous operation of non-basal slip.The intensity of the abnormal extrusion texture increased with the increase in extrusion temperature and ratio.

Cited by 18Publish Year 2015Author P.Hidalgo-Manrique,V.Herrera-Solaz,J.Segurado,J.Segurado,J.Llorca,J.Llorca,F.G abnormal extrusion texture and reversed yield asymmetry in#225;lvez,O.An Unusual Extrusion Texture in MgGdYZr Alloys

Shaoyuan Lyu,Ruixiao Zheng,Wenlong Xiao,Yuanding Huang,Serge Gavras,Norbert Hort,Guodong Li,Chaoli Ma,Abnormal extrusion texture and reversed yield asymmetry in a MgY-Sm-Zn-Zr alloy,Materials Science and Engineering A,10.1016/j.msea.2019.06.029,(2019).Chaoli MA Beihang University (BUAA),Beijing BUAA An extruded MgY-Sm-Zn-Zr alloy exhibited an abnormal texture component,that is,the c-axis of most grains was aligned parallel to the extrusion direction.The reversed yield asymmetry with a British Library EThOS Thermomechanical processing of Extrusions showed low ambient yield asymmetry.The highest measured yield stresses were correlated with partial RX.These two observations can be explained by a balance of texture,Hall-Petch strengthening and work hardening.One unexplained observation of note is that the maximum observed yields generally correspond to a reversed yield asymmetry.

Assessing texture development and mechanical response in

Axisymmetric reverse extrusion experiments were conducted on annealed Cu rod specimens to form cup-shaped structures with sidewall thicknesses ranging from 400 abnormal extrusion texture and reversed yield asymmetry in#181;m down to 25 abnormal extrusion texture and reversed yield asymmetry in#181;m.Changes in Cu grain morphology,size,and texture were examined through scanning electron microscopy and electron backscatter diffraction (EBSD).Analysis of abnormal texture formation and strengthening In addition,texture plays an important role in determining the mechanical properties of extruded Mg alloys.In Mg alloys free of rare earth [[],[],[],[],[],[]],sharp texture with c-axis perpendicular to the extrusion direction is common and causes serious tensile-compression yield asymmetry.With the addition of rare earth elements,the texture intensity of extruded Mg alloys is reduced Abnormal extrusion texture and reversed yield asymmetry in Jul 08,2019 abnormal extrusion texture and reversed yield asymmetry in#0183;An extruded MgY-Sm-Zn-Zr alloy exhibited an abnormal texture component,that is,the c-axis of most grains was aligned parallel to the extrusion direction.The reversed yield asymmetry with a tension/compression of 0.94 was attributed to the activation of

Abnormal Signal Intensity in Skeletal Muscle at MR Imaging

List the causes of abnormal signal intensity in skeletal muscle at MR imaging..Discuss the diagnostic and management issues pertinent to abnormal signal intensity in skeletal muscle..Recognize imaging and clinical findings that suggest a specific diagnosis or help narrow the differential diagnosis.12345NextReducing the tension-compression yield asymmetry in an Sep 07,2018 abnormal extrusion texture and reversed yield asymmetry in#0183;The results show that,in the ultrafine-grained ZK60 alloy,the initial texture of the alloy is a weak (0002) basal fiber texture.As the extrusion temperature increases from 523 to 623 K,the fibrous texture of the base material is weakened,and the tension-compression yield asymmetry(PDF) Tensioncompression asymmetry in severely deformed In order to consider [25].g is an empirical function which gives f 0 the appropri- graingrain interactions and to better predict texture evo- ate shape mimicking the release behavior of tangled dislo- lution,a co-rotation scheme was applied to impose a cations under reverse shear drag eect between neighboring grains [31].

(PDF) Low Cycle Fatigue of an Extruded Mg-3Nd-0.2Zn-0.5Zr

Furthermore,it was reported that RE elements could develop more random textures during hot extrusion and/or generate the socalled ''RE texture component'' even at low alloying levels,which could result in a substantial gain of ductility and reduce the extent of tension-compression asymmetry in the conventional wrought Mg alloys [27].Despite

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