The Experts below are selected from a list of 1119 Experts worldwide ranked by ideXlab platform
Yang Zhou - One of the best experts on this subject based on the ideXlab platform.
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selective laser melting of ti 22al 25nb intermetallic significant effects of Hatch Distance on microstructural features and mechanical properties
Journal of Materials Processing Technology, 2020Co-Authors: Yang Zhou, L. Zhang, Suyuan Zhou, X. Jia, D.w. Wang, Ming YanAbstract:Abstract Ti–22Al–25Nb (at.%) intermetallic is a light weight, high performance, high temperature material with density of merely ˜60% of Ni-based superalloys. The advent and rapid development of selective laser melting (SLM) enable direct fabrication of the Ti–22Al–25Nb intermetallic into complex geometry parts, promising for various critical applications. This paper is dedicated to better understanding the effects of Hatch Distance, an important but often underestimated processing factor, on microstructure and mechanical properties of the SLM-prepared Ti–22Al–25Nb. Along with analytical means such as transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD), finite element simulation has also been employed to explore the underlying mechanisms. It is determined that the highest mechanical properties are achieved at a Hatch Distance of 0.16 mm due to the following factors: (a) High density dislocation, (2) favorable phase features, and (3) high relative density. As-fabricated parts of micro-turbine engine using the optimized parameters are provided in the end of the study to demonstrate the capability of SLM to manufacture high quality and delicate structural parts of the Ti–22Al–25Nb intermetallic.
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Selective laser melting of Ti–22Al–25Nb intermetallic: Significant effects of Hatch Distance on microstructural features and mechanical properties
Journal of Materials Processing Technology, 2020Co-Authors: Yang Zhou, L. Zhang, Suyuan Zhou, X. Jia, D.w. Wang, Ming YanAbstract:Abstract Ti–22Al–25Nb (at.%) intermetallic is a light weight, high performance, high temperature material with density of merely ˜60% of Ni-based superalloys. The advent and rapid development of selective laser melting (SLM) enable direct fabrication of the Ti–22Al–25Nb intermetallic into complex geometry parts, promising for various critical applications. This paper is dedicated to better understanding the effects of Hatch Distance, an important but often underestimated processing factor, on microstructure and mechanical properties of the SLM-prepared Ti–22Al–25Nb. Along with analytical means such as transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD), finite element simulation has also been employed to explore the underlying mechanisms. It is determined that the highest mechanical properties are achieved at a Hatch Distance of 0.16 mm due to the following factors: (a) High density dislocation, (2) favorable phase features, and (3) high relative density. As-fabricated parts of micro-turbine engine using the optimized parameters are provided in the end of the study to demonstrate the capability of SLM to manufacture high quality and delicate structural parts of the Ti–22Al–25Nb intermetallic.
Ming Yan - One of the best experts on this subject based on the ideXlab platform.
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selective laser melting of ti 22al 25nb intermetallic significant effects of Hatch Distance on microstructural features and mechanical properties
Journal of Materials Processing Technology, 2020Co-Authors: Yang Zhou, L. Zhang, Suyuan Zhou, X. Jia, D.w. Wang, Ming YanAbstract:Abstract Ti–22Al–25Nb (at.%) intermetallic is a light weight, high performance, high temperature material with density of merely ˜60% of Ni-based superalloys. The advent and rapid development of selective laser melting (SLM) enable direct fabrication of the Ti–22Al–25Nb intermetallic into complex geometry parts, promising for various critical applications. This paper is dedicated to better understanding the effects of Hatch Distance, an important but often underestimated processing factor, on microstructure and mechanical properties of the SLM-prepared Ti–22Al–25Nb. Along with analytical means such as transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD), finite element simulation has also been employed to explore the underlying mechanisms. It is determined that the highest mechanical properties are achieved at a Hatch Distance of 0.16 mm due to the following factors: (a) High density dislocation, (2) favorable phase features, and (3) high relative density. As-fabricated parts of micro-turbine engine using the optimized parameters are provided in the end of the study to demonstrate the capability of SLM to manufacture high quality and delicate structural parts of the Ti–22Al–25Nb intermetallic.
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Selective laser melting of Ti–22Al–25Nb intermetallic: Significant effects of Hatch Distance on microstructural features and mechanical properties
Journal of Materials Processing Technology, 2020Co-Authors: Yang Zhou, L. Zhang, Suyuan Zhou, X. Jia, D.w. Wang, Ming YanAbstract:Abstract Ti–22Al–25Nb (at.%) intermetallic is a light weight, high performance, high temperature material with density of merely ˜60% of Ni-based superalloys. The advent and rapid development of selective laser melting (SLM) enable direct fabrication of the Ti–22Al–25Nb intermetallic into complex geometry parts, promising for various critical applications. This paper is dedicated to better understanding the effects of Hatch Distance, an important but often underestimated processing factor, on microstructure and mechanical properties of the SLM-prepared Ti–22Al–25Nb. Along with analytical means such as transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD), finite element simulation has also been employed to explore the underlying mechanisms. It is determined that the highest mechanical properties are achieved at a Hatch Distance of 0.16 mm due to the following factors: (a) High density dislocation, (2) favorable phase features, and (3) high relative density. As-fabricated parts of micro-turbine engine using the optimized parameters are provided in the end of the study to demonstrate the capability of SLM to manufacture high quality and delicate structural parts of the Ti–22Al–25Nb intermetallic.
P. Castany - One of the best experts on this subject based on the ideXlab platform.
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Elaboration of oxide dispersion strengthened Fe-14Cr stainless steel by selective laser melting
Journal of Materials Processing Technology, 2019Co-Authors: E. Vasquez, F. Schuster, Aziz Chniouel, Fernando Lomello, Pierre-françois Giroux, Hicham Maskrot, P. CastanyAbstract:This study presents the influence of the main selective laser melting (SLM) processing parameters on the densification behavior and microstructure evolution of oxide dispersion strengthened (ODS) Fe-14Cr stainless steel. Optimization of the process parameters allows to manufacture ODS stainless steel parts, which present high densities up to 98% and a fine dispersion of nanosized Y-Ti rich oxide particles. Laser power and scan speed are found to strongly influence the density and the microstructure of SLM builds. The ratio power over scan speed controls the width and the depth of the molten pool. Low energy densities (i.e. a low laser power or a high scan speed), inferior to 100 J mm−3, cause lack of fusion of the powder and induce the presence of numerous pores. Finer microstructure can be achieved in this condition since grains receive less energy to growth. The Hatch Distance does not affect the density in the range of testing values. A decrease in Hatch Distance causes re-fusion of previous neighbor track but does not re-melt the previous layer since the ratio power over speed is kept constant when varying the Hatch Distance. A slight coarsening of the microstructure is observed in this case. A large range of Hatch Distance can be used and especially large values, which decrease the time of production. This study can be a guideline to achieve materials with specific microstructure for high temperature applications.
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Elaboration of Oxide Dispersion Strengthened Fe-14Cr Steel by Selective Laser Melting
Journal of Materials Processing Technology, 2019Co-Authors: E. Vasquez, Fernando Lomello, P. Castany, Hicham Maskrot, Pf. Giroux, F. SchusterAbstract:This study investigates the feasibility to produce complex ODS Fe-14Cr steel parts by an additive manufacturing process such as selective laser melting (SLM). Milled powder, which is composed of non-spherical shape particules, is used as raw material. The main aim of this work is to assess the effect of each single processing parameter on the properties of SLM builds. Optimization of the process parameters allows to get ODS steel parts, which present high density up to 98percent and a fine dispersion of nanosized Y-Ti rich oxide particles. It is shown that an increase in laser power coupled with a decrease of Hatch Distance as well as the scan speed induce a coarsening of the microstructure. A precise control of the processing parameters allows to tune the microstructure in accordance to the target use of the built ODS steel parts. Since their microstructure is different from the one observed in ODS steel elaborated by conventional routes, new high temperature applications for ODS steels could be explored such as complex heat exchangers built in a single-step.
F. Schuster - One of the best experts on this subject based on the ideXlab platform.
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Elaboration of oxide dispersion strengthened Fe-14Cr stainless steel by selective laser melting
Journal of Materials Processing Technology, 2019Co-Authors: E. Vasquez, F. Schuster, Aziz Chniouel, Fernando Lomello, Pierre-françois Giroux, Hicham Maskrot, P. CastanyAbstract:This study presents the influence of the main selective laser melting (SLM) processing parameters on the densification behavior and microstructure evolution of oxide dispersion strengthened (ODS) Fe-14Cr stainless steel. Optimization of the process parameters allows to manufacture ODS stainless steel parts, which present high densities up to 98% and a fine dispersion of nanosized Y-Ti rich oxide particles. Laser power and scan speed are found to strongly influence the density and the microstructure of SLM builds. The ratio power over scan speed controls the width and the depth of the molten pool. Low energy densities (i.e. a low laser power or a high scan speed), inferior to 100 J mm−3, cause lack of fusion of the powder and induce the presence of numerous pores. Finer microstructure can be achieved in this condition since grains receive less energy to growth. The Hatch Distance does not affect the density in the range of testing values. A decrease in Hatch Distance causes re-fusion of previous neighbor track but does not re-melt the previous layer since the ratio power over speed is kept constant when varying the Hatch Distance. A slight coarsening of the microstructure is observed in this case. A large range of Hatch Distance can be used and especially large values, which decrease the time of production. This study can be a guideline to achieve materials with specific microstructure for high temperature applications.
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Elaboration of Oxide Dispersion Strengthened Fe-14Cr Steel by Selective Laser Melting
Journal of Materials Processing Technology, 2019Co-Authors: E. Vasquez, Fernando Lomello, P. Castany, Hicham Maskrot, Pf. Giroux, F. SchusterAbstract:This study investigates the feasibility to produce complex ODS Fe-14Cr steel parts by an additive manufacturing process such as selective laser melting (SLM). Milled powder, which is composed of non-spherical shape particules, is used as raw material. The main aim of this work is to assess the effect of each single processing parameter on the properties of SLM builds. Optimization of the process parameters allows to get ODS steel parts, which present high density up to 98percent and a fine dispersion of nanosized Y-Ti rich oxide particles. It is shown that an increase in laser power coupled with a decrease of Hatch Distance as well as the scan speed induce a coarsening of the microstructure. A precise control of the processing parameters allows to tune the microstructure in accordance to the target use of the built ODS steel parts. Since their microstructure is different from the one observed in ODS steel elaborated by conventional routes, new high temperature applications for ODS steels could be explored such as complex heat exchangers built in a single-step.
E. Vasquez - One of the best experts on this subject based on the ideXlab platform.
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Elaboration of oxide dispersion strengthened Fe-14Cr stainless steel by selective laser melting
Journal of Materials Processing Technology, 2019Co-Authors: E. Vasquez, F. Schuster, Aziz Chniouel, Fernando Lomello, Pierre-françois Giroux, Hicham Maskrot, P. CastanyAbstract:This study presents the influence of the main selective laser melting (SLM) processing parameters on the densification behavior and microstructure evolution of oxide dispersion strengthened (ODS) Fe-14Cr stainless steel. Optimization of the process parameters allows to manufacture ODS stainless steel parts, which present high densities up to 98% and a fine dispersion of nanosized Y-Ti rich oxide particles. Laser power and scan speed are found to strongly influence the density and the microstructure of SLM builds. The ratio power over scan speed controls the width and the depth of the molten pool. Low energy densities (i.e. a low laser power or a high scan speed), inferior to 100 J mm−3, cause lack of fusion of the powder and induce the presence of numerous pores. Finer microstructure can be achieved in this condition since grains receive less energy to growth. The Hatch Distance does not affect the density in the range of testing values. A decrease in Hatch Distance causes re-fusion of previous neighbor track but does not re-melt the previous layer since the ratio power over speed is kept constant when varying the Hatch Distance. A slight coarsening of the microstructure is observed in this case. A large range of Hatch Distance can be used and especially large values, which decrease the time of production. This study can be a guideline to achieve materials with specific microstructure for high temperature applications.
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Elaboration of Oxide Dispersion Strengthened Fe-14Cr Steel by Selective Laser Melting
Journal of Materials Processing Technology, 2019Co-Authors: E. Vasquez, Fernando Lomello, P. Castany, Hicham Maskrot, Pf. Giroux, F. SchusterAbstract:This study investigates the feasibility to produce complex ODS Fe-14Cr steel parts by an additive manufacturing process such as selective laser melting (SLM). Milled powder, which is composed of non-spherical shape particules, is used as raw material. The main aim of this work is to assess the effect of each single processing parameter on the properties of SLM builds. Optimization of the process parameters allows to get ODS steel parts, which present high density up to 98percent and a fine dispersion of nanosized Y-Ti rich oxide particles. It is shown that an increase in laser power coupled with a decrease of Hatch Distance as well as the scan speed induce a coarsening of the microstructure. A precise control of the processing parameters allows to tune the microstructure in accordance to the target use of the built ODS steel parts. Since their microstructure is different from the one observed in ODS steel elaborated by conventional routes, new high temperature applications for ODS steels could be explored such as complex heat exchangers built in a single-step.
