A novel Ti/Al lightweight graded material was fabricated successfully using the direct laser deposition process, with the composition continuously changing from 100 vol.-% Ti6Al4V to 100 vol.-% AlSi10Mg. Microstructures and phase transformations were characterised, and the mechanical properties of the Ti/Al lightweight graded material were investigated. It was found that element concentrations followed a nearly linear relationship along the compositional gradient. The maximum hardness reached 619 HV in the ‘II’ zones, and then it decreased gradually to 214 HV at the outermost layer, with the increase in the proportion of AlSi10Mg. The values for the ultimate tensile strength were above 400 MPa, and the fracture surfaces indicated a transition from ductile to brittle fracture along the graded direction.
BuchbinderD, MeinersW, PirchN, Investigation on reducing distortion by preheating during manufacture of aluminum components using selective laser melting. J Laser Appl.2014;26:012004. doi: 10.2351/1.4828755
2.
ParkGH, KimJT, ParkHJ, Development of lightweight Mg-Li-Al alloys with high specific strength. J Alloys Compd.2016;680:116–120. doi: 10.1016/j.jallcom.2016.04.109
3.
KumarN, MirejaS, KhandelwalV, Light-weight high-strength hollow glass microspheres and bamboo fiber based hybrid polypropylene composite: a strength analysis and morphological study. Compos Part B Eng.2017;109:277–285. doi: 10.1016/j.compositesb.2016.10.052
4.
WuAP, SongZH, NakataK, Interface and properties of the friction stir welded joints of titanium alloy Ti6Al4V with aluminum alloy 6061. Mater Des.2014;71:85–92. doi: 10.1016/j.matdes.2014.12.015
5.
KempenK, ThijsL, Van HumbeeckJ, Processing AlSi10Mg by selective laser melting: parameter optimisation and material characterisation. Mater Sci Technol.2015;31:917–923. doi: 10.1179/1743284714Y.0000000702
6.
TongJ, BowenCR, PerssonJ, Mechanical properties of titanium-based Ti–6Al–4V alloys manufactured by powder bed additive manufacture. Mater Sci Technol.2017;33:138–148. doi: 10.1080/02670836.2016.1172787
7.
MartinLP, PattersonJR, OrlikowskiD, Application of tape-cast graded impedance impactors for light-gas gun experiments. J Appl Phys.2007;102:023507. doi: 10.1063/1.2756058
8.
RyanS., ChristiansenEL.Hypervelocity impact testing of advanced materials and structures for micrometeoroid and orbital debris shielding. Acta Astronaut.2013;83:216–231. doi: 10.1016/j.actaastro.2012.09.012
9.
KimYH, ChoiC, Sathish KumarSK, Hypervelocity impact on flexible curable composites and pure fabric layer bumpers for inflatable space structures. Compos Struct.2017;176:1061–1072. doi: 10.1016/j.compstruct.2017.06.035
10.
HuangX, YinC, HuangJ, Hypervelocity impact of TiB2-based composites as front bumpers for space shield applications. Mater Des.2016;97:473–482. doi: 10.1016/j.matdes.2016.02.126
11.
YangZY, ZhengXH, CaiW.Martensitic transformation and shape memory effect of Ti-V-Al lightweight high-temperature shape memory alloys. Scr Mater.2015;99:97–100. doi: 10.1016/j.scriptamat.2014.11.038
12.
BobbioLD, OtisRA, BorgoniaJP, Additive manufacturing of a functionally graded material from Ti-6Al-4V to invar: experimental characterization and thermodynamic calculations. Acta Mater.2017;127:133–142. doi: 10.1016/j.actamat.2016.12.070
13.
ChenX, YanJ, RenS, Microstructure and mechanical properties of Ti-6Al-4V/Al1060 joints by ultrasonic-assisted brazing in air. Mater Lett.2013;95:197–200. doi: 10.1016/j.matlet.2012.12.105
14.
ChenSH, LiLQ, ChenYB.Interfacial reaction mode and its influence on tensile strength in laser joining Al alloy to Ti alloy. Mater Sci Technol.2010;26:230–235. doi: 10.1179/174328409X399056
15.
SzczepanikS.Processing of PM aluminium alloy based gradient materials. Arch Civ Mech Eng.2012;12:413–417. doi: 10.1016/j.acme.2012.08.005
16.
NaebeM, ShirvanimoghaddamK.Functionally graded materials: a review of fabrication and properties. Appl Mater Today.2016;5:223–245. doi: 10.1016/j.apmt.2016.10.001
17.
LiSN, XiongHP, LiN, Mechanical properties and formation mechanism of Ti/SiC system gradient materials fabricated by in-situ reaction laser cladding. Ceram Int.2017;43:961–967. doi: 10.1016/j.ceramint.2016.10.026
18.
ReichardtA, DillonRP, BorgoniaJP, Development and characterization of Ti-6Al-4V to 304L stainless steel gradient components fabricated with laser deposition additive manufacturing. Mater Des.2016;104:404–413. doi: 10.1016/j.matdes.2016.05.016
19.
PengX, YanM, ShiW.A new approach for the preparation of functionally graded materials via slip casting in a gradient magnetic field. Scr Mater.2007;56:907–909. doi: 10.1016/j.scriptamat.2006.12.020
20.
ZhangJ, WangYQ, ZhouBL.Microstructure and tensile properties of graded Al–Mg2 Si in situ composites fabricated by centrifugal casting. Mater Sci Technol.1999;15:1236–1240.
21.
WangGY, GuSN, YangS.Microstructure and properties of tungsten heavy alloys fabricated by laser direct deposition. Mater Sci Technol.2017;33:415–420. doi: 10.1080/02670836.2016.1221492
22.
WangX, DengD, YiH, Influences of pulse laser parameters on properties of AISI316L stainless steel thin-walled part by laser material deposition. Opt Laser Technol.2017;92:5–14. doi: 10.1016/j.optlastec.2016.12.021
23.
YusufSM, GaoN.Influence of energy density on metallurgy and properties in metal additive manufacturing. Mater Sci Technol.2017;33:1269–1289. doi: 10.1080/02670836.2017.1289444
24.
CarrollBE, OtisRA, BorgoniaJP, Functionally graded material of 304L stainless steel and inconel 625 fabricated by directed energy deposition: characterization and thermodynamic modeling. Acta Mater.2016;108:46–54. doi: 10.1016/j.actamat.2016.02.019
25.
ZhangYZ, MeacockC, VilarR.Laser powder micro-deposition of compositional gradient Ti-Cr alloy. Mater Des.2010;31:3891–3895. doi: 10.1016/j.matdes.2010.02.052
26.
MullerP, MognolP, HascoetJY.Modeling and control of a direct laser powder deposition process for functionally graded materials (FGM) parts manufacturing. J Mater Process Technol.2013;213:685–692. doi: 10.1016/j.jmatprotec.2012.11.020
27.
LinX, YueTM, YangHO, Microstructure and phase evolution in laser rapid forming of a functionally graded Ti-Rene88DT alloy. Acta Mater.2006;54:1901–1915. doi: 10.1016/j.actamat.2005.12.019
28.
GuoP, ZouB, HuangC, Study on microstructure, mechanical properties and machinability of efficiently additive manufactured AISI 316L stainless steel by high-power direct laser deposition. J Mater Process Technol.2017;240:12–22. doi: 10.1016/j.jmatprotec.2016.09.005
29.
LimaDD, MantriSA, MiklerCV, Laser additive processing of a functionally graded internal fracture fixation plate. Mater Des.2017;130:8–15. doi: 10.1016/j.matdes.2017.05.034
30.
OlakanmiEO, CochraneRF, DalgarnoKW.A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: processing, microstructure, and properties. Prog Mater Sci.2015;74:401–477. doi: 10.1016/j.pmatsci.2015.03.002
31.
BeeseAM, CarrollBE.Review of mechanical properties of Ti-6Al-4V made by laser-based additive manufacturing using powder feedstock. JOM.2016;68:724–734. doi: 10.1007/s11837-015-1759-z
32.
LinX, YueTM, YangHO, Solidification behavior and the evolution of phase in laser rapid forming of graded Ti6Al4V-Rene88DT alloy. Metall Mater Trans A Phys Metall Mater Sci.2007;38:127–137. doi: 10.1007/s11661-006-9021-5
33.
CaiY, ChengL, YinH, Preparation and mechanical properties of Ti3SiC2/SiC functionally graded materials. Ceram Int.2017;43:6648–6658. doi: 10.1016/j.ceramint.2017.02.025
