This study investigates the effect of composition and process parameters on the crack susceptibility of the Cu -SS304L system during laser directed energy deposition (LDED). The microstructure of LDED deposits is analysed aiming at elemental distribution and crack susceptibility. The trapping behaviour of Cu changes with Cu concentration. The crack susceptibility reduces with Cu concentration and escalates with an increase in laser power and scan speed, irrespective of composition. The mode of solidification cracking varied from the rupture of Cu film to crack-assisted porosity. Furthermore, the critical solidification cooling rate is estimated for LDED of different blended Cu -SS for crack-free deposition. The above findings offer insights into cracking behaviour and provide processing guidelines for LDED of Cu -SS.
PaulCYadavSRaiA, et al.Laser directed energy deposition based additive manufacturing of metallic multi-material: a review. J Metall Mater Sci2021; 63: 75–87.
2.
YadavSPaulCPRaiAK, et al.Elucidating laser directed energy deposition based additive manufacturing of copper–stainless steel functionally graded material: processing and material behavior. J Manuf Process2023; 92: 107–123.
3.
ChenyangWFeiXGuojianX, et al.Ta/Cu transition region in TC4/Inconel718 bimetallic structure fabricated by laser deposition manufacturing. Sci Technol Weld Joining2023; 28: 200–208.
4.
JoshiGRBadhekaVJDarjiRS, et al.The joining of copper to stainless steel by solid-state welding processes: a review. Materials2022; 15: 7234.
5.
NiknamianS. Investigation of microstructure and corrosion resistance of dissimilar welded joint between 304 stainless steel and pure copper, BIRCU, 2018. https://doi.org/10.33258/birex.v1i3.382
6.
SinghGSaxenaRKPandeyS. Investigating the effect of arc offsetting in AISI 304 stainless steel and copper welding using gas tungsten arc welding. J Braz Soc Mech Sci Eng2021; 43: 1–22.
7.
RafieiMMostaanH. The effect of filler metal and butter layer on microstructural and mechanical properties of pure Cu to AISI304 stainless steel dissimilar joint.Proc Inst Mech Eng, Part L2019; 233: 1894–1905.
8.
ChatterjeeASpragueEMazumderJ,et al.Hierarchical microstructures and deformation behavior of laser direct-metal-deposited Cu–Fe alloys. Mater Sci Eng A2021; 802: 140659.
9.
EskinDGSuyitnoKatgermanL. Mechanical properties in the semi-solid state and hot tearing of aluminium alloys. Prog Mater Sci2004; 49: 629–711.
10.
HyerHZhouLMehtaA, et al.Composition-dependent solidification cracking of aluminum-silicon alloys during laser powder bed fusion. Acta Mater2021; 208: 116698.
11.
NoeckerFFDuPontJN. Functionally graded copper–steel using laser engineered net shaping™ process. In International Congress on Applications of Lasers & Electro-Optics (Vol. 2002, No. 1, p. 185430). Laser Institute of America, 2002, October.
12.
OsipovichKSAstafurovaEGChumaevskiiAV, et al.Gradient transition zone structure in “steel–copper” sample produced by double wire-feed electron beam additive manufacturing. J Mater Sci2020; 55: 9258–9272.
13.
RockCTarafderPIvesL,et al.Characterization of copper & stainless steel interface produced by electron beam powder bed fusion. Mater Des2021; 212: 110278.
14.
ZaiLZhangCWangY, et al.Laser powder bed fusion of precipitation-hardened martensitic stainless steels: a review. Metals2020; 10: 255.
15.
YadavSPaulCPJinoopAN, et al.Laser directed energy deposition based additive manufacturing of copper: process development and material characterizations. J Manuf Process2020; 58: 984–997.
16.
ZhangXPanTChenY, et al.Additive manufacturing of copper–stainless steel hybrid components using laser-aided directed energy deposition. J Mater Sci Technol2021; 80: 100–116.
17.
ImranMKMasoodSHBrandtM. Direct metal deposition of H13 tool steel on copper alloy substrate: parametric investigation. Lasers Manuf Mater Process2015; 2: 242–260.
18.
ZhangXSunCPanT, et al.Additive manufacturing of copper–H13 tool steel bi-metallic structures via Ni-based multi-interlayer. Addit Manuf2020; 36: 101474.
19.
ChenYZLiuFYangGC, et al.Rapid solidification of bulk undercooled hypoperitectic Fe–Cu alloy. J Alloys Compd2007; 427: L1–L5.
20.
ChatterjeeASpragueEMazumderJ,et al.Hierarchical microstructures and deformation behavior of laser direct-metal-deposited Cu–Fe alloys. Mater Sci Eng A2021; 802: 140659.
21.
ShiRPWangCPWheelerD, et al.Formation mechanisms of self-organized core/shell and core/shell/corona microstructures in liquid droplets of immiscible alloys. Acta Mater2013; 61: 1229–1243.
22.
CahillJAKirshenbaumAD. The density of liquid copper from its melting point (1356 K.) to 2500 K. and an estimate of its critical constants1, 2. J Phys Chem1962; 66: 1080–1082.
23.
RumbleJ. CRC handbook of chemistry and physics. CRC press, 2022, 103rd edn, vol. 2022-2023, pp.14–29.
24.
KimCS. Thermophysical properties of stainless steels. No. ANL-75-55. Argonne National Lab., Illinois (USA), 1975.
25.
RaghavanNSimunovicSDehoffR, et al.Localized melt-scan strategy for site specific control of grain size and primary dendrite arm spacing in electron beam additive manufacturing. Acta Mater2017; 140: 375–387.
26.
SunZTanXTorSB,et al.Selective laser melting of stainless steel 316L with low porosity and high build rates. Mater Des2016; 104: 197–204.
27.
QuestedPNBrooksRFChapmanL,et al.Measurement and estimation of thermophysical properties of nickel based superalloys. Mater Sci Technol2009; 25: 154–162.
28.
MillsKC. Recommended values of thermophysical properties for selected commercial alloys. Woodhead Publishing, 2002.
29.
ConiglioNCrossCE. Initiation and growth mechanisms for weld solidification cracking. Int Mater Rev2013; 58: 375–397.
30.
LiuJRaoZLiaoS,et al.Modeling of transport phenomena and solidification cracking in laser spot bead-on-plate welding of AA6063-T6 alloy. Part II—simulation results and experimental validation. Int J Adv Manuf Technol2014; 74: 285–296.
31.
PelliniWS. Strain theory of hot tearing. Foundry1952; 80: 125–133.
32.
CarterLNAttallahMMReedRC. Laser powder bed fabrication of nickel-base superalloys: influence of parameters; characterisation, quantification and mitigation of cracking. Superalloys2012; 2012: 2826–2834.
33.
KouraytemNChiangP-JJiangR, et al.Solidification crack propagation and morphology dependence on processing parameters in AA6061 from ultra-high-speed x-ray visualization. Addit Manuf2021; 42: 101959.
