Mechanical behaviour of Haynes 230 and Inconel 625 manufactured by selective laser melting (SLM) has been experimentally investigated in 870oC. Significant embrittlement of SLM Inconel 625 was found, accompanied by hardening behaviour during the test. Moreover, due to inhomogeneous grain deformation, the hardness dispersion of the two SLM alloys increased significantly. Employing a systematic research with scanning electron microscopy and energy-dispersive spectrometer, intergranular cracking of two SLM alloys can be observed from the surface cracks and fracture appearances, respectively. In addition, carbides along grain boundaries of the two nickel-based superalloys were found and affected the strength of the grain boundary at 870oC. Therefore, it resulted in different fracture mechanisms.
LiDGuoQGuoSThe microstructure evolution and nucleation mechanisms of dynamic recrystallization in hot-deformed Inconel 625 superalloy. Mater Des. 2011; 32(2):696–705.
2.
WangXFanFSzpunarJAInfluence of grain orientation on the incipient oxidation behavior of Haynes 230 at 900°C. Mater Charact. 2015; 107:33–42.
3.
KumagaiMKimuraKShimadaNInhomogeneous strain and recrystallisation of a shot-peened Inconel 625 alloy after annealing. Mater Sci Technol. 2019; 35(15):1856–1863.
4.
LiSWeiQShiYMicrostructure characteristics of Inconel 625 superalloy manufactured by selective laser Melting. J Mater Sci Technol. 2015; 31(9):946–952.
5.
SongJZhangLWuWUnderstanding processing parameters affecting residual stress in selective laser melting of Inconel 718 through numerical modeling. J Mater Res. 2019; 34:1–10.
6.
JiaQGuD.Selective laser melting additive manufacturing of TiC/Inconel 718 bulk-form nanocomposites: densification, microstructure, and performance. J Mater Res. 2014; 29(17):1960–1969.
7.
SongHMcGaughyTSadekAEffect of structural support on microstructure of nickel base superalloy fabricated by laser-powder bed fusion additive manufacturing. Addit Manuf. 2019; 26:30–40.
8.
LiuXZhaoCZhouXCNT-reinforced AlSi10Mg composite by selective laser melting: microstructural and mechanical properties. Mater Sci Technol. 2019; 35(9):1038–1045.
9.
LiCGuoYBZhaoJB.Interfacial phenomena and characteristics between the deposited material and substrate in selective laser melting Inconel 625. J Mater Process Technol. 2017; 243:269–281.
10.
JiaoZHLeiLMYuHCExperimental evaluation on elevated temperature fatigue and tensile properties of one selective laser melted nickel based superalloy. Int J Fatigue. 2019; 121:172–180.
11.
BenedettiMSantusC.Notch fatigue and crack growth resistance of Ti-6Al-4V ELI additively manufactured via selective laser melting: a critical distance approach to defect sensitivity. Int J Fatigue. 2018; 121:281–292.
12.
GuDDMeinersWWissenbachKLaser additive manufacturing of metallic components: materials, processes and mechanisms. Int Mater Rev. 2012; 57(3):133–164.
13.
KreitcbergABrailovskiVTurenneS.Effect of heat treatment and hot isostatic pressing on the microstructure and mechanical properties of Inconel 625 alloy processed by laser powder bed fusion. Mater Sci Eng A. 2017; 689:1–10.
14.
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 Manuf. 2018; 24:419–431.
15.
DebRoyTWeiHLZubackJSAdditive manufacturing of metallic components – process, structure and properties. Prog Mater Sci. 2018; 92:112–224.
16.
ZhangLSongJWuWEffect of processing parameters on thermal behavior and related density in GH3536 alloy manufactured by selective laser melting. J Mater Res. 2019; 34:1–10.
17.
ZhangFLevineLEAllenAJEffect of heat treatment on the microstructural evolution of a nickel-based superalloy additive-manufactured by laser powder bed fusion. Acta Mater. 2018; 152:200–214.
18.
WangXCarterLNPangBMicrostructure and yield strength of SLM-fabricated CM247LC Ni-superalloy. Acta Mater. 2017; 128:87–95.
19.
YadollahiAShamsaeiNThompsonSMEffects of building orientation and heat treatment on fatigue behavior of selective laser melted 17-4 PH stainless steel. Int J Fatigue. 2017; 94:218–235.
20.
MarcheseGLorussoMPariziaSInfluence of heat treatments on microstructure evolution and mechanical properties of Inconel 625 processed by laser powder bed fusion. Mater Sci. Eng. A. 2018; 729:64–75.
21.
KreitcbergABrailovskiVTurenneS.Elevated temperature mechanical behavior of IN625 alloy processed by laser powder-bed fusion. Mater Sci Eng A. 2017; 700:540–553.
22.
LiCWhiteRFangXYMicrostructure evolution characteristics of Inconel 625 alloy from selective laser melting to heat treatment. Mater Sci Eng A. 2017; 705:20–31.
23.
HuDWangTMaQEffect of inclusions on low cycle fatigue lifetime in a powder metallurgy nickel-based superalloy FGH96. Int J Fatigue. 2019; 118:237–248.
24.
MaXWeiDHanQParametric study of cyclic plasticity behavior in a directionally solidified superalloy with partial recrystallization by crystal plasticity finite element simulation. J Mater Eng Perform. 2019; 28(6):3332–3340.
25.
MaXJiangJZhangWEffect of local recrystallized grains on the low cycle fatigue behavior of a nickel-based single crystal superalloy. Crystals (Basel). 2019; 06/18(9):312.
26.
PoulinJRBrailovskiVTerriaultP.Long fatigue crack propagation behavior of Inconel 625 processed by laser powder bed fusion: influence of build orientation and post-processing conditions. Int J Fatigue. 2018; 116:634–647.
27.
KoutiriIPessardEPeyrePInfluence of SLM process parameters on the surface finish, porosity rate and fatigue behavior of as-built Inconel 625 parts. J Mater Process Technol. 2018; 255:536–546.
28.
HuX.Microstructure and mechanical behavior of Inconel 625 alloy processed by selective laser melting at high temperature up to 1000oC. Rare Met. 2019.
29.
HuXXueZZhaoGLaser welding of a selective laser melted Ni-base superalloy: microstructure and high temperature mechanical property. Mater Sci Eng A. 2019; 745:335–345.
30.
BarrettPRAhmedRMenonMIsothermal low-cycle fatigue and fatigue-creep of Haynes 230. Int J Solids Struct. 2016; 88–89:146–164.
31.
AhmedRBarrettPRHassanT.Unified viscoplasticity modeling for isothermal low-cycle fatigue and fatigue-creep stress–strain responses of Haynes 230. Int J Solids Struct. 2016; 88-89:131–145.
32.
AhmedRBarrettPRMenonMThermo-mechanical low-cycle fatigue-creep of Haynes 230. Int J Solids Struct. 2017; 126-127:90–104.
33.
EwestDAlmrothPSjödinBIsothermal and thermomechanical fatigue crack propagation in both virgin and thermally aged Haynes 230. Int J Fatigue. 2019; 120:96–106.
34.
ÖzgünÖÖzkan GülsoyHYilmazRInjection molding of nickel based 625 superalloy: sintering, heat treatment, microstructure and mechanical properties. J Alloys Compd. 2013; 546:192–207.
35.
KimISChoiBGHongHUAnomalous deformation behavior and twin formation of Ni-base superalloys at the intermediate temperatures. Mater Sci Eng A. 2011; 528(24):7149–7155.
36.
BrandMJ.Mechanical properties and microstructure evaluation of powder bed fused inconel 625 nickel alloy. Socorro ( NM): New Mexico Institute of Mining and Technology; 2016.
37.
KongDNiXDongCHeat treatment effect on the microstructure and corrosion behavior of 316L stainless steel fabricated by selective laser melting for proton exchange membrane fuel cells. Electrochim Acta. 2018; 276:293–303.
38.
RandleV.Mechanism of twinning-induced grain boundary engineering in low stacking-fault energy materials. Acta Mater. 1999; 47(15):4187–4196.
39.
KimDSahIJangC.Effects of high temperature aging in an impure helium environment on low temperature embrittlement of Alloy 617 and Haynes 230. J Nucl Mater. 2010; 405(1):9–16.
40.
JiangLHuRKouHThe effect of M23C6 carbides on the formation of grain boundary serrations in a wrought Ni-based superalloy. Mater Sci Eng A. 2012; 536:37–44.
41.
HrutkayK.Evolution of microstructure of Haynes 230 and Inconel 617 under mechanical testing at high temperatures. Columbia: University of South Carolina; 2013.
42.
KontisPCollinsDMWilkinsonAJMicrostructural degradation of polycrystalline superalloys from oxidized carbides and implications on crack initiation. Scr Mater. 2018; 147:59–63.
