Effect of processing parameters on thermal behavior and related density in GH3536 alloy manufactured by selective laser
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Effect of processing parameters on thermal behavior and related density in GH3536 alloy manufactured by selective laser melting Liang Zhang1 , Jia Song2,a) , Wenheng Wu3,b), Zhibin Gao4, Beibei He3, Xiaoqing Ni2, Qianlei Long3, Lin Lu3, Guoliang Zhu5 1
Shanghai Engineering Research Center of 3D Printing Materials, Shanghai Research Institute of Materials, Shanghai 200437, China Shanghai Engineering Research Center of 3D Printing Materials, Shanghai 200437, China Shanghai Research Institute of Materials, Shanghai 200437, China 4 Center for Phononics and Thermal Energy Science, China-EU Joint Center for Nanophononics, Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China 5 Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China a) Address all correspondence to these authors. e-mail: [email protected] b) e-mail: [email protected] 2 3
Received: 25 September 2018; accepted: 26 December 2018
GH3536 alloy is one of the high-temperature nickel-based alloys and widely applied in aviation and aerospace industries. In this study, a combination of experiment and simulation is proposed to study the effect of processing parameters on the selective laser melting (SLM) of GH3536 powder. It is concluded that the relationship between density and laser input energy during SLM complies with a quadratic function and presents an inverted U-shaped distribution. By fitting density and input power to a quadratic polynomial, the optimal laser input energy during SLM of GH3536 alloy can be obtained. The result shows that using 275 W laser power and 960 mm/s scanning speed, the SLM GH3536 specimens can reach the maximum density. This experimental result is consistent with the simulation result obtained by analyzing molten pool dimension. Furthermore, a full process energy prediction diagram for SLM GH3536 alloy based on the simulated molten pool depth and width is proposed. The result shows that it provides an innovative and efficient method for the selection of processing parameters during SLM of GH3536 powder.
Introduction GH3536 alloy, is one of the high-temperature nickel-based alloys, has excellent anti-oxidation, hot corrosion resistance, and superior mechanical performance. Besides, it also possesses satisfactory hot and cold processing formability and can maintain moderate creep strength under 900 °C [1]. Based on these good properties, GH3536 alloy has drawn extensive attention for practical applications in aviation and aerospace industries, for instance, it is suitable to make aviation engine combustion chamber components and other high-temperature parts. Nevertheless, with the rapid development of industrial technology, traditional manufacturing technique for GH3536 components is increasingly incapable of meeting the demand for complex construction design.
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