选区激光熔化铜合金纳米力学性能实验研究
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摘要
针对选区激光熔化铜合金成形微观力学性能,采用正交实验设计方法,研究了不同工艺参数(激光功率、扫描速度、扫描间距)对成形样件纳米压痕硬度的影响.通过方差分析,得出了不同工艺参数对其纳米硬度影响程度,从而为选区激光熔化成形工艺提高零件表面微观力学性能提供理论指导.
In view of the micro-mechanical property of copper alloy fabricated by selective laser melting(SLM), the effects of different processing parameters(laser power, scanning speed and scanning space) on the nanoindentation hardness were researched according to the orthogonal experimental design test method. Based on the analysis of variance, the impact degree of diverse processing parameters on the nanohardness was obtained, which could provide a theoretical direction for improving the micro-mechanical property of parts during SLM.
In view of the micro-mechanical property of copper alloy fabricated by selective laser melting(SLM), the effects of different processing parameters(laser power, scanning speed and scanning space) on the nanoindentation hardness were researched according to the orthogonal experimental design test method. Based on the analysis of variance, the impact degree of diverse processing parameters on the nanohardness was obtained, which could provide a theoretical direction for improving the micro-mechanical property of parts during SLM.
引文
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[3]Thijs L,Verhaeghe F,Craeghs T,et al.A study of the micro structural evolution during selective laser melting of Ti-6Al-4V[J].Acta Mater,2010,58:3303.
[4]Gu D D,Meiners W,Wissenbach K,et al.Laser additive manufacturing of metallic components:materials,processes and mechanisms[J].Int Mater Rev,2013,57:133.
[5]Kruth J P,Mercelis P,Van Vaerenbergh J,et al.Binding mechanisms in selective laser sintering and selective laser melting[J].Rapid Prototyping J,2005,11:26.
[6]Strano G,Hao L,Everson R M,et al.Surface roughness analysis,modelling and prediction in selective laser melting[J].J Mater Process Technol,2013,213:589.
[7]Leary M.Surface roughness optimisation for selective laser melting(SLM)[M]//Brandt M.Laser additive manufacturing.[S.l.]:Woodhead Publishing,2017:99.
[8]Li C,White R,Fang X Y,et al.Microstructure evolution characteristics of inconel 625alloy from selective laser melting to heat treatment[J].Mater Sci Eng:A,2017,705:20.
[9]Gu D D,Hagedorn Y C,Meiners W,et al.Densification behavior,microstructure evolution,and wear performance of selective laser melting processed commercially pure titanium[J].Acta Mater,2012,60:3849.
[10]Huang Y C,Chang S Y,Chang C H.Effect of residual stresses on mechanical properties and interface adhesion strength of SiN thin films[J].Thin Solid Films,2009,517:4857.
[11]Hao L,Raymont D,Yan C Z,et al.Design and additive manufacturing of cellular lattice structures[C]//Bartolo P J,et al.Innovative developments in virtual and physical prototyping.London:Taylor&Francis Group,2012:249.
[12]Calignano F.Design optimization of supports for overhanging structures in aluminum and titanium alloys by selective laser melting[J].Mater Des,2014,64:203.
[13]Attar H,Prashanth K G,Chaubey A K,et al.Comparison of wear properties of commercially pure titanium prepared by selective laser melting and casting processes[J].Mater Lett,2015,142:38.
[14]Zhou Y,Wen S F,Song B,et al.A novel titanium alloy manufactured by selective laser melting:microstructure,high temperature oxidation resistance[J].Mater Des,2016,89:1199.
[15]Van Hooreweder B,Apers Y,Lietaert K,et al.Improving the fatigue performance of porous metallic biomaterials produced by selective laser melting[J].Acta Biomater,2017,47:193.
[16]靳巧玲,李国禄,王海斗,等.纳米压痕技术在材料力学测试中的应用[J].表面技术2015,44:127.
[17]Aboulkhair N T,Everitt N M,Ashcroft I,et al.Reducing porosity in AlSi10Mg parts processed by selective laser melting[J].Addit Manuf,2014,1-4:77.
[18]Zhang B C,Lee X H,Bai J M,et al.Study of selective laser melting(SLM)Inconel 718part surface improvement by electrochemical polishing[J].Mater Des,2017,116:531.
[19]Mao Z,Zhang D,Wei P,et al.Manufacturing feasibility and forming properties of Cu-4Sn in selective laser melting[J].Materials,2017,10:333.
[20]Oliver W C,Pharr G M.An improved technique for determining hardness and elastic-modulus using load and displacement sensing indentation experiments[J].J Mater Res,1992,7:1564.
[21]Uzun O,K9lemen U,elebi S,et al.Modulus and hardness evaluation of polycrystalline superconductors by dynamic microindentation technique[J].JEur Ceram Soc,2005,25:969.
[22]Scudino S,Liu G,Sakaliyska M,et al.Powder metallurgy of Al-based metal matrix composites reinforced withβ-Al3Mg2intermetallic particles:analysis and modeling of mechanical properties[J].Acta Mater,2009,57:4529.