The Experts below are selected from a list of 101493 Experts worldwide ranked by ideXlab platform
R Yang - One of the best experts on this subject based on the ideXlab platform.
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low cycle fatigue properties of a titanium alloy exhibiting nonlinear Elastic Deformation behavior
Acta Materialia, 2011Co-Authors: M T Jia, Y L Hao, S Q Zhang, Frederic Prima, L J Chen, R YangAbstract:Strain-controlled low-cycle fatigue (LCF) behavior of a metastable beta-type titanium alloy Ti-24Nb-4Zr-8Sn (wt.%, termed Ti2448) was investigated at room temperature under different cycle strains. The results showed that the alloy possesses good LCF resistance because applied total cycle strains up to 4.5% are endured mainly by the recoverable Elastic strain. The study also revealed a dependence of the Elastic Deformation behavior on the loading condition: nonlinear Elasticity with large recoverable strains in uniaxial tension but almost linear Elasticity with higher Elastic modulus and lower recoverable strain in uniaxial compression. The above Elastic asymmetry explains the facts that both fatigue life in LCF and fatigue strength in high-cycle fatigue are worse in tension compression cycles than in tension tension cycles. Microstructure analyses of these fatigue-tested specimens showed that the beta phase is Elastically stable at cycle stresses up to similar to 400 MPa whereas further increasing the applied cycle stress and strain results in small amounts of the omega phase and the alpha '' martensite. These two stress-induced phase transformations are competing and exclude each other across a wide range of cycle stress. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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fatigue properties of a multifunctional titanium alloy exhibiting nonlinear Elastic Deformation behavior
Scripta Materialia, 2009Co-Authors: Shuang Zhang, M T Jia, Y L Hao, R YangAbstract:We report the fatigue endurance of a multifunctional β type titanium alloy exhibiting nonlinear Elastic Deformation behavior. Compared with other β type titanium alloys possessing linear Elasticity, the alloy shows a similar ratio of fatigue strength to yield strength but a much lower ratio to tensile strength for smooth specimens with different fatigue stress ratios. The finding shows for the first time that titanium alloys exhibiting unstable Elastic and plastic Deformation behavior are capable of long-term load-bearing applications.
Bo Mattiasson - One of the best experts on this subject based on the ideXlab platform.
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effect of matrix Elasticity on affinity binding and release of bioparticles elution of bound cells by temperature induced shrinkage of the smart macroporous hydrogel
Langmuir, 2007Co-Authors: Igor Yu Galaev, Maria B Dainiak, Fatima M Plieva, Bo MattiassonAbstract:The first step of bacterial or viral invasion is affinity and presumably multisite binding of bioparticles to an Elastic matrix like a living tissue. We have demonstrated that model bioparticles such as inclusion bodies (spheres of about 1 microm in size) Escherichia coli cells (rods 1 x 3 microm), yeast cells (8 microm spheres), and synthetic microgel particles (0.4 microm spheres) are binding via different affinity interactions (IgG antibody-protein A, sugar-lectin, and metal ion-chelate) to a macroporous hydrogel (MH) matrix bearing appropriate ligands. The Elastic Deformation of the MH results in the detachment of affinity bound bioparticles. The particle detachment on Elastic Deformation is believed to be due to multipoint attachment of the particles to affinity matrix and the disturbance of the distance between affinity ligands when the matrix is deformed. No release of affinity bound protein occurred on Elastic Deformation. The efficiency of the particle release by the Elastic Deformation depends on the density of the ligands at the particle surface as well as on the Elasticity of the matrix for relatively large particles. The release of the particles occurred irrespectively of whether the Deformation was caused by external forces (mechanical Deformation) or internal forces (the shrinkage of thermosensitive macroporous poly-N-isopropylacrylamide hydrogel on increase in temperature).
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effect of matrix Elasticity on affinity binding and release of bioparticles elution of bound cells by temperature induced shrinkage of the smart macroporous hydrogel
Langmuir, 2007Co-Authors: Igor Yu Galaev, Maria B Dainiak, Fatima M Plieva, Bo MattiassonAbstract:The first step of bacterial or viral invasion is affinity and presumably multisite binding of bioparticles to an Elastic matrix like a living tissue. We have demonstrated that model bioparticles such as inclusion bodies (spheres of about 1 mu m in size) Escherichia coli cells (rods 1 x 3 mu m), yeast cells (8 mu m spheres), and synthetic microgel particles (0.4 mu m spheres) are binding via different affinity interactions (IgG antibody-protein A, sugar-lectin, and metal ion-chelate) to a macroporous hydrogel (MH) matrix bearing appropriate ligands. The Elastic Deformation of the MH results in the detachment of affinity bound bioparticles. The particle detachment on Elastic Deformation is believed to be due to multipoint attachment of the particles to affinity matrix and the disturbance of the distance between affinity ligands when the matrix is deformed. No release of affinity bound protein occurred on Elastic Deformation. The efficiency of the particle release by the Elastic Deformation depends on the density of the ligands at the particle surface as well as on the Elasticity of the matrix for relatively large particles. The release of the particles occurred irrespectively of whether the Deformation was caused by external forces (mechanical Deformation) or internal forces (the shrinkage of thermosensitive macroporous poly-N-isopropylacrylamide hydrogel on increase in temperature). (Less)
Y L Hao - One of the best experts on this subject based on the ideXlab platform.
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low cycle fatigue properties of a titanium alloy exhibiting nonlinear Elastic Deformation behavior
Acta Materialia, 2011Co-Authors: M T Jia, Y L Hao, S Q Zhang, Frederic Prima, L J Chen, R YangAbstract:Strain-controlled low-cycle fatigue (LCF) behavior of a metastable beta-type titanium alloy Ti-24Nb-4Zr-8Sn (wt.%, termed Ti2448) was investigated at room temperature under different cycle strains. The results showed that the alloy possesses good LCF resistance because applied total cycle strains up to 4.5% are endured mainly by the recoverable Elastic strain. The study also revealed a dependence of the Elastic Deformation behavior on the loading condition: nonlinear Elasticity with large recoverable strains in uniaxial tension but almost linear Elasticity with higher Elastic modulus and lower recoverable strain in uniaxial compression. The above Elastic asymmetry explains the facts that both fatigue life in LCF and fatigue strength in high-cycle fatigue are worse in tension compression cycles than in tension tension cycles. Microstructure analyses of these fatigue-tested specimens showed that the beta phase is Elastically stable at cycle stresses up to similar to 400 MPa whereas further increasing the applied cycle stress and strain results in small amounts of the omega phase and the alpha '' martensite. These two stress-induced phase transformations are competing and exclude each other across a wide range of cycle stress. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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fatigue properties of a multifunctional titanium alloy exhibiting nonlinear Elastic Deformation behavior
Scripta Materialia, 2009Co-Authors: Shuang Zhang, M T Jia, Y L Hao, R YangAbstract:We report the fatigue endurance of a multifunctional β type titanium alloy exhibiting nonlinear Elastic Deformation behavior. Compared with other β type titanium alloys possessing linear Elasticity, the alloy shows a similar ratio of fatigue strength to yield strength but a much lower ratio to tensile strength for smooth specimens with different fatigue stress ratios. The finding shows for the first time that titanium alloys exhibiting unstable Elastic and plastic Deformation behavior are capable of long-term load-bearing applications.
M T Jia - One of the best experts on this subject based on the ideXlab platform.
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low cycle fatigue properties of a titanium alloy exhibiting nonlinear Elastic Deformation behavior
Acta Materialia, 2011Co-Authors: M T Jia, Y L Hao, S Q Zhang, Frederic Prima, L J Chen, R YangAbstract:Strain-controlled low-cycle fatigue (LCF) behavior of a metastable beta-type titanium alloy Ti-24Nb-4Zr-8Sn (wt.%, termed Ti2448) was investigated at room temperature under different cycle strains. The results showed that the alloy possesses good LCF resistance because applied total cycle strains up to 4.5% are endured mainly by the recoverable Elastic strain. The study also revealed a dependence of the Elastic Deformation behavior on the loading condition: nonlinear Elasticity with large recoverable strains in uniaxial tension but almost linear Elasticity with higher Elastic modulus and lower recoverable strain in uniaxial compression. The above Elastic asymmetry explains the facts that both fatigue life in LCF and fatigue strength in high-cycle fatigue are worse in tension compression cycles than in tension tension cycles. Microstructure analyses of these fatigue-tested specimens showed that the beta phase is Elastically stable at cycle stresses up to similar to 400 MPa whereas further increasing the applied cycle stress and strain results in small amounts of the omega phase and the alpha '' martensite. These two stress-induced phase transformations are competing and exclude each other across a wide range of cycle stress. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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fatigue properties of a multifunctional titanium alloy exhibiting nonlinear Elastic Deformation behavior
Scripta Materialia, 2009Co-Authors: Shuang Zhang, M T Jia, Y L Hao, R YangAbstract:We report the fatigue endurance of a multifunctional β type titanium alloy exhibiting nonlinear Elastic Deformation behavior. Compared with other β type titanium alloys possessing linear Elasticity, the alloy shows a similar ratio of fatigue strength to yield strength but a much lower ratio to tensile strength for smooth specimens with different fatigue stress ratios. The finding shows for the first time that titanium alloys exhibiting unstable Elastic and plastic Deformation behavior are capable of long-term load-bearing applications.
S Q Zhang - One of the best experts on this subject based on the ideXlab platform.
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low cycle fatigue properties of a titanium alloy exhibiting nonlinear Elastic Deformation behavior
Acta Materialia, 2011Co-Authors: M T Jia, Y L Hao, S Q Zhang, Frederic Prima, L J Chen, R YangAbstract:Strain-controlled low-cycle fatigue (LCF) behavior of a metastable beta-type titanium alloy Ti-24Nb-4Zr-8Sn (wt.%, termed Ti2448) was investigated at room temperature under different cycle strains. The results showed that the alloy possesses good LCF resistance because applied total cycle strains up to 4.5% are endured mainly by the recoverable Elastic strain. The study also revealed a dependence of the Elastic Deformation behavior on the loading condition: nonlinear Elasticity with large recoverable strains in uniaxial tension but almost linear Elasticity with higher Elastic modulus and lower recoverable strain in uniaxial compression. The above Elastic asymmetry explains the facts that both fatigue life in LCF and fatigue strength in high-cycle fatigue are worse in tension compression cycles than in tension tension cycles. Microstructure analyses of these fatigue-tested specimens showed that the beta phase is Elastically stable at cycle stresses up to similar to 400 MPa whereas further increasing the applied cycle stress and strain results in small amounts of the omega phase and the alpha '' martensite. These two stress-induced phase transformations are competing and exclude each other across a wide range of cycle stress. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.