Inconel 625 alloy resists corrosion, fatigue and wear at elevated temperatures and hence they are used in aerospace, chemical, petrochemical, marine, and other high-temperature applications. In the present study, single beads of Inconel 625 were deposited using the cold metal transfer (CMT) based wire arc deposition process. Seven heat input conditions were used to study the microstructure and mechanical characteristics. Microstructural characterization was done with optical and scanning electron microscopes while microhardness was measured using the Vickers microhardness testing method. It has been observed that the microstructure of the deposited beads consists of a columnar structure with primary dendrites. Also, intermetallic elements like Niobium (Nb), Molybdenum (Mo), and Laves were formed. It was also observed that the percentage of Nb and Mo increases with heat input. The microhardness increases with an increase in heat input and the maximum hardness was found to be 234.7 HV.
YeniCKoçakM.Fracture analysis of laser beam welded superalloys Inconel 718 and 625 using the FITNET procedure. Int J Press Vessel Pip2008;
85: 532–539.
2.
WangJFSunQJWangH, et al.
Effect of location on microstructure and mechanical properties of additive layer manufactured Inconel 625 using gas tungsten arc welding. Mater Sci Eng A2016;
676: 395–405.
3.
SelviSVishvaksenanARajasekarE.Cold metal transfer (CMT) technology – An overview. Def Technol2018;
14: 28–44.
4.
LiSWeiQShiY, et al.
Microstructure characteristics of Inconel 625 superalloy manufactured by selective laser melting. J Mater Sci Technol2015;
31: 946–952.
5.
HuebnerJKataDKusińskiJ, et al.
Microstructure of laser cladded carbide reinforced Inconel 625 alloy for turbine blade application. Ceram Int2017;
43: 8677–8684.
6.
AbioyeTEMcCartneyDGClareAT.Laser cladding of Inconel 625 wire for corrosion protection. J Mater Process Technol2015;
217: 232–240.
7.
MarcheseGPariziaSRashidiM, et al.
The role of texturing and microstructure evolution on the tensile behavior of heat-treated Inconel 625 produced via laser powder bed fusion. Mater Sci Eng A2020;
769: 138500.
8.
OliveiraJPSantosTGMirandaRM.Revisiting fundamental welding concepts to improve additive manufacturing: from theory to practice. Prog Mater Sci2020;
107: 100590.
9.
RiveraOGAllisonPGJordonJB, et al.
Microstructures and mechanical behavior of Inconel 625 fabricated by solid-state additive manufacturing. Mater Sci Eng A2017;
694: 1–9.
10.
LearyMMazurMWilliamsH, et al.
Inconel 625 lattice structures manufactured by selective laser melting (SLM): mechanical properties, deformation, and failure modes. Mater Des2018;
157: 179–199.
11.
MarcheseGLorussoMPariziaS, et al.
Influence of heat treatments on microstructure evolution and mechanical properties of Inconel 625 processed by laser powder bed fusion. Mater Sci Eng A2018;
729: 64–75.
12.
PleassCJothiS.Influence of powder characteristics and additive manufacturing process parameters on the microstructure and mechanical behaviour of Inconel 625 fabricated by selective laser melting. Addit Manuf2018;
24: 419–431.
13.
KoutiriIPessardEPeyreP, et al.
Influence of SLM process parameters on the surface finish, porosity rate, and fatigue behavior of as-built Inconel 625 parts. J Mater Process Technol2018;
255: 536–546.
14.
GonzalezJAMirelesJStaffordSW, et al.
Characterization of Inconel 625 fabricated using powder-bed-based additive manufacturing technologies. J Mater Process Technol2019;
264: 200–210.
15.
HuXAXueZYZhaoGL, et al.
Laser welding of a selective laser melted Ni-base superalloy: microstructure and high temperature mechanical property. Mater Sci Eng A2019;
745: 335–345.
16.
DindaGPDasguptaAKMazumderJ.Laser aided direct metal deposition of Inconel 625 superalloy: microstructural evolution and thermal stability. Mater Sci Eng A2009;
509: 98–104.
17.
AbioyeTEFolkesJClareAT.A parametric study of Inconel 625 wire laser deposition. J Mater Process Technol2013;
213: 2145–2151.
18.
SandhuSSShahiAS.Metallurgical, wear and fatigue performance of Inconel 625 weld claddings. J Mater Process Technol2016;
233: 1–8.
19.
Naghiyan FesharakiMShoja-RazaviRMansouriHA, et al.
Microstructure investigation of Inconel 625 coating obtained by laser cladding and TIG cladding methods. Surf Coat Technol2018;
353: 25–31.
20.
FengKChenYDengP, et al.
Improved high-temperature hardness and wear resistance of Inconel 625 coatings fabricated by laser cladding. J Mater Process Technol2017;
243: 82–91.
21.
Zareie RajaniHRAkbari MousaviSAA.The effect of explosive welding parameters on metallurgical and mechanical interfacial features of Inconel 625/plain carbon steel bimetal plate. Mater Sci Eng A2012;
556: 454–464.
22.
YangfanWXizhangCChuanchuS.Microstructure and mechanical properties of Inconel 625 fabricated by wire-arc additive manufacturing. Surf Coat Technol2019;
374: 116–123.
23.
KindermannRMRoyMJMoranaR, et al.
Process response of Inconel 718 to wire + arc additive manufacturing with cold metal transfer. Mater Des2020;
195: 109031.
24.
YildizASDavutKKocB, et al.
Wire arc additive manufacturing of high-strength low alloy steels: study of process parameters and their influence on the bead geometry and mechanical characteristics. Int J Adv Manuf Technol2020;
108: 3391–3404.
25.
XiaHTanCTianR, et al.
Influence of shielding gas on microstructure and mechanical properties of laser welded–brazed Al/steel lapped joint. J Manuf Process2020;
54: 347–358.
26.
SarathchandraDTDavidsonMJVisvanathanG.Parameters effect on SS304 beads deposited by wire arc additive manufacturing. Mater Manuf Process2020;
35: 852–858.
27.
WanHYZhouZJLiCP, et al.
Effect of scanning strategy on grain structure and crystallographic texture of inconel 718 processed by selective laser melting. J Mater Sci Technol2018;
34: 1799–1804.
28.
ZhangDNiuWCaoX, et al.
Effect of standard heat treatment on the microstructure and mechanical properties of selective laser melting manufactured Inconel 718 superalloy. Mater Sci Eng A2015;
644: 32–40.
29.
ZubackJSDebRoyT.The hardness of additively manufactured alloys. Materials (Basel)2018;
11: 2070.
30.
AdamiecJ.High temperature corrosion of power boiler components cladded with nickel alloys. Mater Charact2009;
60: 1093–1099.
31.
Devendranath RamkumarKKumarPSGSai RadhakrishnaV, et al.
Studies on microstructure and mechanical properties of keyhole mode Nd:YAG laser welded Inconel 625 and duplex stainless steel, SAF 2205. J Mater Res2015;
30: 3288–3298.
