The diffusion bonding behaviour of CoCrNi and CoCrFeNi alloys (concentrated solid solution alloys) with 316 stainless steel (316SS) at relatively low temperatures (800 °C, 0.65 Tm) was investigated. A comprehensive analysis of the microstructure, diffusion behaviour, mechanical properties, and solid solution stability was carried out. The CoCrNi/316SS joints have superior interfacial quality, a wider interdiffusion zone, and stronger mechanical properties than the CoCrFeNi/316SS joints because in ternary CoCrNi alloys, the diffusion of iron is enhanced by the tendency to form a stable FCC solid solution, which improves joint quality and stability.
ChengCYYangYCZhongYZ, et al.Physical metallurgy of concentrated solid solutions from low-entropy to high-entropy alloys. Curr Opin Solid State Mater Sci2017; 21: 299–311.
2.
WuYLuoKZhangY, et al.Microstructures and mechanical properties of a CoCrFeNiMn high-entropy alloy obtained by 223K cryorolling and subsequent annealing. J Alloys Compd2022; 921: 166166.
3.
YiJZhuangXHeJ, et al.Effect of Mo doping on the gaseous hydrogen embrittlement of a CoCrNi medium-entropy alloy. Corros Sci2021; 189: 109628.
4.
AliNZhangLLiuD, et al.Strengthening mechanisms in high entropy alloys: a review. Mater Today Commun2022; 33: 104686.
5.
LiJMengXWanL, et al.Welding of high entropy alloys: progresses, challenges and perspectives. J Manuf Process2021; 68: 293–331.
6.
HuangSYuanGShengJ, et al.Strengthening mechanism and hydrogen-induced crack resistance of AISI 316L stainless steel subjected to laser peening at different power densities. Int J Hydrogen Energy2018; 24: 11263–11274.
7.
ChengW, et al.Plastic deformation behavior of 316 stainless steel subjected to multiple laser shock imprinting impacts. Opt Laser Technol2022; 153: 108201.
8.
ZhangXChenLZhouJ, et al.Simulation and experimental studies on process parameters, microstructure and mechanical properties of selective laser melting of stainless steel 316L. J Braz Soc Mech Sci Eng2020; 42: 02.
TakahashiY. Pressureless solid state diffusion bonding of ferritic stainless steel honeycomb matrix. Sci Technol Weld Joining1999; 4: 125–132.
11.
ÇamGMüllauerJKoçakM. Diffusion bonding of two phase γ-TiAl alloys with duplex microstructure. Sci Technol Weld Joining1997; 2: 213–219.
12.
ElmerJWKlingmanJvan BibberK. Effect of surface condition and bonding pressure on quality of diffusion bonded high purity copper for linear collider accelerator structures. Sci Technol Weld Joining2001; 6: 268–272.
13.
KunduSChatterjeeS. Microstructure and mechanical properties of diffusion bonded joints between titanium and stainless steel with copper interlayer. Sci Technol Weld Joining2007; 12: 572–578.
14.
ZhaoDSYanJCWangCW, et al.Interfacial structure and mechanical properties of hot roll bonded joints between titanium alloy and stainless steel using copper interlayer. Sci Technol Weld Joining2008; 13: 765–768.
15.
ZhangCShirzadiAA. Diffusion bonding of copper alloy to nickel-based superalloy: effect of heat treatment on the microstructure and mechanical properties of the joints. Sci Technol Weld Joining2021; 26: 213–219.
16.
YangM-XLiR-GJiangP, et al.Residual stress provides significant strengthening and ductility in gradient structured materials. Mater Res Lett2019; 7: 433–438.
17.
LiYLiZWuQ, et al.Laser lap joining of R60702 zirconium alloy and 304 stainless steel utilizing CoNiTiV high entropy alloy. Mater Lett2024; 375: 137248.
18.
SokkalingamRMuthupandiVSivaprasadK, et al.Dissimilar welding of Al0.1CoCrFeNi high-entropy alloy and AISI304 stainless steel. J Mater Res2019; 34: 2683–2694.
19.
PengHBakerIYiY, et al.Dissimilar electron beam welding of the medium-entropy alloy (NiCoCr)94Al3Ti3 to 304 stainless steel. Scr Mater2022; 214: 114659.
20.
LiJYinRZhaoH, et al.Microstructure and mechanical characterization of diffusion-bonded CoCrCuFeNi HEA/TC4 titanium alloy joints using a Ni interlayer. Weld World2025; 69: 1593–1605.
21.
LiPSunHDongH, et al.Microstructural evolution, bonding mechanism and mechanical properties of AlCoCrFeNi2.1 eutectic high entropy alloy joint fabricated via diffusion bonding. Mater Sci Eng A2021; 814: 141211.
22.
LiPSunHWangS, et al.Rotary friction welding of AlCoCrFeNi2.1 eutectic high entropy alloy. J Alloys Compd2020; 814: 152322.
23.
SunHHashimotoNOkaH. Vacuum diffusion bonding between equiatomic CoCrNi-based concentrated solid solution alloys system and 316 stainless steel by spark plasma sintering. Mater Sci Eng A2023; 879: 145297.
24.
VaidyaMTrubelSMurtyBS, et al.Ni Tracer diffusion in CoCrFeNi and CoCrFeMnNi high entropy alloys. J Alloys Compd2016; 688: 994–1001.
25.
PengYLiJLShiJM, et al.Microstructure and mechanical properties of diffusion bonded joints of high-entropy alloy Al5(HfNbTiZr)95 and TC4 titanium alloy. J Mater Res Technol2021; 11: 1741–1752.
26.
ChenXChenXXuH, et al.Monte Carlo simulation and experimental measurements of grain growth in the heat affected zone of 304 stainless steel during multipass welding. Int J Adv Manuf Technol2015; 80: 1197–1211.
27.
FangYJJiangXSMoDF, et al.Microstructure and mechanical properties of the vacuum diffusion bonding joints of 4J29 Kovar alloy and 316L stainless steel using pure cobalt interlayer. Vacuum2019; 168: 108847.
28.
MaXXieHLiS, et al.Deformation-induced structural multiplicity of tilt boundaries facilitating the formation of two-dimensional interfacial superstructures. Int J Plast2024; 174: 103910.
29.
YangPXieHLiS, et al.Interfacial Kagome lattice transitions induced by segregation of solute atoms. Acta Mater2024; 267: 119756.
30.
WangXLiCXuY, et al.Revisiting the vacancy diffusion behavior under the influence of solute trapping in dilute alloys. Acta Mater2025; 228: 120788. 10.1016/j.actamat.2025.120788
31.
DabasBRuffiniALe BouarY, et al.Phase-field modeling of cavity growth and dislocation climb. Acta Mater2025; 293: 121040.
32.
YanZShiSSangP, et al.Multi-phase-field simulation of the dynamic dragging of dislocation on the solute atoms and point defects. J Mater Eng Perform2024; 33: 6857–6869.
33.
KeJHBoyneAWangY, et al.Phase field microelasticity model of dislocation climb: methodology and applications. Acta Mater2014; 79: 396–410.
34.
LiuFCocksACFTarletonE. Dislocation climb driven by lattice diffusion and core diffusion. J Mech Phys Solids2023; 176: 105300.
35.
CantorB. Multicomponent high-entropy Cantor alloys. Prog Mater Sci2021; 120: 100754.
36.
CuiXGWangXHYinGC, et al.Three-dimensional (3-D) temperature distribution simulation of fiber laser butt welding of AISI 304 stainless steel. Lasers Eng2018; 39: 3–6.
37.
YanZSunCLiuS, et al.Vacuum diffusion bonding strengthening mechanical properties of 304 stainless steel/low carbon steel composites by in-situ eutectic reaction. Vacuum2025; 238: 114279.
38.
SunHHanYLiY. Microstructure and strength of diffusion bonding W alloy/304 stainless steel joint using a Cu interlayer. Int J Refract Met Hard Mater2023; 113: 106188.
39.
SamiuddinMLiJChandioAD, et al.Diffusion welding of CoCrNi medium entropy alloy (MEA) and SUS 304 stainless steel at different bonding temperatures. Weld World2021; 65: 2193–2206.
40.
YamagishiH. Spot forge-welding for rapid dissimilar joining of Fe to Al to produce an intermetallic compound-free interface. Mater Trans2021; 62: 1576–1582.
41.
YangXZhangY. Prediction of high-entropy stabilized solid-solution in multi-component alloys. Mater Chem Phys2012; 132: 233–238.
42.
ChenRQinGZhengH, et al.Composition design of high entropy alloys using the valence electron concentration to balance strength and ductility. Acta Mater2018; 144: 129–137.
OhMCLeeHSharmaA, et al.Controlled valence electron concentration approach to tailor the microstructure and phase stability of an entropy-enhanced AlCoCrFeNi alloy. Metall Mater Trans A2022; 53: 1831–1844.
45.
GuoSHuQNgC, et al.More than entropy in high-entropy alloys: forming solid solutions or amorphous phase. Intermetallics2013; 41: 96–103.
46.
KangHXuZWuB, et al.Phase stability and mechanical properties of the six-principal element TiVNbCrCoNi alloys. J Alloys Compd2024; 993: 174661.
