The Experts below are selected from a list of 53391 Experts worldwide ranked by ideXlab platform
Christian Coddet - One of the best experts on this subject based on the ideXlab platform.
-
effects of processing parameters on properties of selective laser melting mg 9 Al Powder mixture
Materials & Design, 2012Co-Authors: Han Lin Liao, Christian CoddetAbstract:Abstract In the present study, selective laser melting (SLM) was used to sinter a Powder mixture of Mg–9%Al. Both densification mechanism and microstructure evolution of laser sintered Powder mixture were established. The effect of laser processing parameter on Mg–9%Al Powder using SLM was Also investigated. It can be found that a maximum relative density was 82% with preferable process parameters of v = 0.02 m/s, P = 15 W. An overlapped structure can be obtained when decreasing the laser energy density due to an incomplete melt. On the other hand, a severe particulate agglomeration appeared as the increase of the laser energy due to a bAlling effect. A criticAl scanning speed of 0.02 m/s can ensure that the particulates were well melted and not evaporated during the experiment. Moreover, the Mg and Al elements were dispersed uniformly in the samples. The microstructure and composition phase were studied through scanning electron microscopy (SEM) and X-ray elementAl mapping (XRD) respectively.
-
effects of processing parameters on properties of selective laser melting mg 9 Al Powder mixture
Materials & Design, 2012Co-Authors: Baicheng Zhang, Han Lin Liao, Christian CoddetAbstract:Abstract In the present study, selective laser melting (SLM) was used to sinter a Powder mixture of Mg–9%Al. Both densification mechanism and microstructure evolution of laser sintered Powder mixture were established. The effect of laser processing parameter on Mg–9%Al Powder using SLM was Also investigated. It can be found that a maximum relative density was 82% with preferable process parameters of v = 0.02 m/s, P = 15 W. An overlapped structure can be obtained when decreasing the laser energy density due to an incomplete melt. On the other hand, a severe particulate agglomeration appeared as the increase of the laser energy due to a bAlling effect. A criticAl scanning speed of 0.02 m/s can ensure that the particulates were well melted and not evaporated during the experiment. Moreover, the Mg and Al elements were dispersed uniformly in the samples. The microstructure and composition phase were studied through scanning electron microscopy (SEM) and X-ray elementAl mapping (XRD) respectively.
Han Lin Liao - One of the best experts on this subject based on the ideXlab platform.
-
effects of processing parameters on properties of selective laser melting mg 9 Al Powder mixture
Materials & Design, 2012Co-Authors: Han Lin Liao, Christian CoddetAbstract:Abstract In the present study, selective laser melting (SLM) was used to sinter a Powder mixture of Mg–9%Al. Both densification mechanism and microstructure evolution of laser sintered Powder mixture were established. The effect of laser processing parameter on Mg–9%Al Powder using SLM was Also investigated. It can be found that a maximum relative density was 82% with preferable process parameters of v = 0.02 m/s, P = 15 W. An overlapped structure can be obtained when decreasing the laser energy density due to an incomplete melt. On the other hand, a severe particulate agglomeration appeared as the increase of the laser energy due to a bAlling effect. A criticAl scanning speed of 0.02 m/s can ensure that the particulates were well melted and not evaporated during the experiment. Moreover, the Mg and Al elements were dispersed uniformly in the samples. The microstructure and composition phase were studied through scanning electron microscopy (SEM) and X-ray elementAl mapping (XRD) respectively.
-
effects of processing parameters on properties of selective laser melting mg 9 Al Powder mixture
Materials & Design, 2012Co-Authors: Baicheng Zhang, Han Lin Liao, Christian CoddetAbstract:Abstract In the present study, selective laser melting (SLM) was used to sinter a Powder mixture of Mg–9%Al. Both densification mechanism and microstructure evolution of laser sintered Powder mixture were established. The effect of laser processing parameter on Mg–9%Al Powder using SLM was Also investigated. It can be found that a maximum relative density was 82% with preferable process parameters of v = 0.02 m/s, P = 15 W. An overlapped structure can be obtained when decreasing the laser energy density due to an incomplete melt. On the other hand, a severe particulate agglomeration appeared as the increase of the laser energy due to a bAlling effect. A criticAl scanning speed of 0.02 m/s can ensure that the particulates were well melted and not evaporated during the experiment. Moreover, the Mg and Al elements were dispersed uniformly in the samples. The microstructure and composition phase were studied through scanning electron microscopy (SEM) and X-ray elementAl mapping (XRD) respectively.
Hongyao Shen - One of the best experts on this subject based on the ideXlab platform.
-
microstructure and mechanicAl properties of selective laser melted mg 9 wt Al Powder mixture
Materials Letters, 2018Co-Authors: Xiaomiao Niu, Hongyao ShenAbstract:Abstract Selective laser melting (SLM) of Mg-Al Powder mixture is a promising method to additively manufacture Mg-Al Alloy components without using pre-Alloyed Powder as feedstock. However, the microstructure and consequent tensile properties of SLMed Mg-9 wt%Al Powder mixture have not been systematicAlly investigated. In this work, sphericAl Mg and Al Powder with a weight ratio of 91:9 were mixed using bAll milling and the mixture was SLMed at different processing parameters. Mg-Al Alloy was successfully fabricated and the highest relative density achieved was 95.7%. The results of scanning electron microscopy showed that the microstructure and volume of defects could be controlled by tuning the processing parameters. The highest ultimate tensile strength achieved was 274 MPa, which was comparable to the strength of SLMed pre-Alloyed Mg-9 wt%Al as reported in literature. Based on this study, SLM of different Mg Powder mixture can be investigated in future.
Alexander S Mukasyan - One of the best experts on this subject based on the ideXlab platform.
-
influence of the high energy bAll milling on structure and reactivity of the ni Al Powder mixture
Journal of Alloys and Compounds, 2013Co-Authors: A S Rogachev, N F Shkodich, S G Vadchenko, F Baras, Yu D Kovalev, S Rouvimov, A A Nepapushev, Alexander S MukasyanAbstract:Abstract Investigation of the micro- and atomic structures for the planetary bAll-milled Ni + Al mixtures has reveAled existence of intermediate nano-crystAlline and amorphous phases, which are not detectable by XRD anAlysis, but can be observed by means of HRTEM. AnneAling of the milled mixtures at moderate temperature, 205–280 °C, transforms the nano-phases into crystAl state and makes them XRD-detectable. These nano-scAle structures may serve as nucleus for the intermetAllic phases produced via reaction between Ni and Al and, therefore, decrease the activation energy of this reaction and diminish the temperature of the reaction initiation. Apparently, the active nano-phases are formed due to sliding of Al and Ni layers during the bAll milling. The simple model is suggested, which Allows non-contradictory explanations of the nucleus formation and their influence on the reactivity of the mixture.
Baicheng Zhang - One of the best experts on this subject based on the ideXlab platform.
-
effects of processing parameters on properties of selective laser melting mg 9 Al Powder mixture
Materials & Design, 2012Co-Authors: Baicheng Zhang, Han Lin Liao, Christian CoddetAbstract:Abstract In the present study, selective laser melting (SLM) was used to sinter a Powder mixture of Mg–9%Al. Both densification mechanism and microstructure evolution of laser sintered Powder mixture were established. The effect of laser processing parameter on Mg–9%Al Powder using SLM was Also investigated. It can be found that a maximum relative density was 82% with preferable process parameters of v = 0.02 m/s, P = 15 W. An overlapped structure can be obtained when decreasing the laser energy density due to an incomplete melt. On the other hand, a severe particulate agglomeration appeared as the increase of the laser energy due to a bAlling effect. A criticAl scanning speed of 0.02 m/s can ensure that the particulates were well melted and not evaporated during the experiment. Moreover, the Mg and Al elements were dispersed uniformly in the samples. The microstructure and composition phase were studied through scanning electron microscopy (SEM) and X-ray elementAl mapping (XRD) respectively.