选择性激光熔化成形Ti_6Al_4V钛合金的滚动接触疲劳性能研究
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摘要
选择性激光熔化技术(SLM)可直接成形出传统方式加工工序复杂周期长甚至无法加工出的复杂零件,是增材制造(3D打印)领域最具有应用前景的技术之一。目前针对该技术的研究主要集中在拉伸、压缩等静力学方面,而许多应用场合下,动力学性能也有要求。以钛合金(Ti-6Al-4V)粉末为试验材料,对不同后处理下的SLM件进行了滚动接触疲劳性能研究。结果表明,粗糙度和硬度是影响SLM件滚动接触疲劳性能的主要因素,抛光处理和热处理能提高滚动接触疲劳寿命;粗糙度较大时SLM钛合金测试件主要是磨损失效,粗糙度较小时主要是材料脱落失效。
Selective Laser Melting( SLM) can directly fabricate parts that are difficult or time-consuming for processing or even can not be processed in traditional way. And SLM is one of most promising addictive manufacturing techniques. The current study is mainly concentrated on statics performance,such as tensile and compression properties. However,in many cases,the dynamic performance is required. This research Based on Ti-6 Al-4 V powders as the experimental material,SLM under different post-processing pieces for the rolling contact fatigue performance study. It was found that the roughness and hardness is main factors of rolling contact fatigue performance. Polishing and heat treatment can improve the rolling contact fatigue life. Big roughness causes wear failure of the SLM-fabricated titanium alloy parts,and small roughness mainly leads to spalling failure.
Selective Laser Melting( SLM) can directly fabricate parts that are difficult or time-consuming for processing or even can not be processed in traditional way. And SLM is one of most promising addictive manufacturing techniques. The current study is mainly concentrated on statics performance,such as tensile and compression properties. However,in many cases,the dynamic performance is required. This research Based on Ti-6 Al-4 V powders as the experimental material,SLM under different post-processing pieces for the rolling contact fatigue performance study. It was found that the roughness and hardness is main factors of rolling contact fatigue performance. Polishing and heat treatment can improve the rolling contact fatigue life. Big roughness causes wear failure of the SLM-fabricated titanium alloy parts,and small roughness mainly leads to spalling failure.
引文
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[12]崔华威,崔秀芳,王海斗,等.表面完整性对涂层滚动接触疲劳寿命影响的研究进展[J].金属热处理,2014,39(11):1-8.CUI Hua Wei1,CUI XiuFang1,WANG Hai Dou,et al.Research progress in effects of surface integrity on rolling contact fatigue life of coatings,[J].Heat Treatment of Metals,2014,39(11):1-8(In Chinese).
[13]章刚,刘军,刘永寿,等.表面粗糙度对表面应力集中系数和疲劳寿命影响分析[J].机械强度,2010(1):110-115.ZHANG Gang,LIU Jun,LIU Yong Shou,et al.Effect of roughness on surface stress concentration factor and fatigue life[J].Journal of Mechanical Strength,2010(1):110-115(In Chinese).
[14]Gong H,Rafi K,Gu H,et al.Analysis of Defect Generation in Ti-6al-4v Parts Made Using Powder Bed Fusion Addit-ive Manufacturing Processes[J].Additive Manufacturing,2014(1-4):87-98.
[15]Yasa E,Kruth J.Microstructural Investi-gation of Selectiv-e Laser Melting 316l Stain-less Steel Parts Exposed to La-ser Remelting[J].Procedia Engineering,2011(19):389-395.
[2]马思超.从分布式计算到分布式制造:3D打印模式带来的制造业革命[J].新材料产业,2013(2):48-50.MA Si Chao.From distributed computing to distributed manufacturing:manufacturing revolution in 3D printing.[J].New materials industry,2013(2):48-50(In Chinese).
[3]Qiu C,Adkins NJ,Attallah MM.Microstructure and Tens-ile Properties of Selectively Laser-melted and of Hiped L-aser-melted Ti-6al-4v[J].Materials Science&Engineeri-ng a,2013(578):230-239.
[4]Hooreweder BV,Moens D,Boonen R,et al.Analysis of F-racture Toughness and Crack Propagation of Ti6al4v Pro-duced By Selective Laser Melting[J].Advanced Enginee-ring Materials,2012,14(1):92-97.
[5]Siddique S,Imran M,Rauer M,et al.Computed Tomograp-hy for Characterization of Fatigue Performance of Selecti-ve Laser Melted Parts[J].Materials&Design,2015(83):661-669.
[6]Thijs L,Verhaeghe F,Craeghs T,et al.A Study of the Microstructural Evolution During Selective Laser Melting of Ti-6al-4v[J].Acta Materialia,2010,58(9):3303-3312.
[7]Edwards P,Ramulu M.Fatigue Performance Evaluation of Selective Laser Melted Ti-6al-4v[J].Materials Science&Engineering a,2014(598):327-337.
[8]Mumtaz K,Hopkinson N.Top Surface and Side Roughne-ss of Inconel 625 Parts Processed Using Selective Laser Melting[J].Rapid Prototyping Journal,2009,15(2):96-103.
[9]Strano G,Hao L,Everson RM,et al.Surface Roughness A-nalysis,Modelling and Prediction in Selective Laser Melt-ing[J].Journal of Materials Processing Technology,2013,213(4):589-597.
[10]甘章华,梁宇,王锦林,等.热处理工艺对TC4钛合金组织及硬度的影响[J].金属热处理,2014(9):36-40.GAN ZhangHua,LIANG Yu,WANG JinLin,et al.Effects of heat treatment process on microstructure and hardness of TC4 titanium alloy[J].Heat Treatment of Metals,2014(9):36-40(In Chinese).
[11]Güleryüz H,imenogˇlu H.Effect of Thermal Oxidation on Corrosion and Corrosion-wear Behaviour of a Ti-6al-4v Alloy[J].Biomaterials,2004,25(16):3325-3333.
[12]崔华威,崔秀芳,王海斗,等.表面完整性对涂层滚动接触疲劳寿命影响的研究进展[J].金属热处理,2014,39(11):1-8.CUI Hua Wei1,CUI XiuFang1,WANG Hai Dou,et al.Research progress in effects of surface integrity on rolling contact fatigue life of coatings,[J].Heat Treatment of Metals,2014,39(11):1-8(In Chinese).
[13]章刚,刘军,刘永寿,等.表面粗糙度对表面应力集中系数和疲劳寿命影响分析[J].机械强度,2010(1):110-115.ZHANG Gang,LIU Jun,LIU Yong Shou,et al.Effect of roughness on surface stress concentration factor and fatigue life[J].Journal of Mechanical Strength,2010(1):110-115(In Chinese).
[14]Gong H,Rafi K,Gu H,et al.Analysis of Defect Generation in Ti-6al-4v Parts Made Using Powder Bed Fusion Addit-ive Manufacturing Processes[J].Additive Manufacturing,2014(1-4):87-98.
[15]Yasa E,Kruth J.Microstructural Investi-gation of Selectiv-e Laser Melting 316l Stain-less Steel Parts Exposed to La-ser Remelting[J].Procedia Engineering,2011(19):389-395.