Interfacial microstructure of diffusion bonded joints of TC4 titanium alloy and additive manufactured 17-4PH stainless steel and effect of process parameters

doi:10.13251/j.issn.0254-6051.2024.11.008

Abstract

Abstract: TC4 titanium alloy and atomic diffusion additive manufactured(ADAM) 17-4PH( stainless steel were diffusion bonded with different interlayers at different temperatures. The microstructure characteristics and properties of the joint interface were analyzed by means of optical microscope, scanning electron microscope, EDS analysis and microhardness testing. The results show that a well formed TC4 titanium alloy/ADAM 17-4PH stainless steel diffusion bonded joint is obtained by using a Cu foil+Ni foil composite interlayer at 960 ℃ and 920 ℃, with holding time of 60 min and welding pressure of 2 MPa. The interfacial area mainly includes four different zones, namely the diffusion affected zone on the TC4 titanium alloy side (DAZ 1), the interface reaction zone (IRZ 1 and IRZ 2) generated by the diffusion reaction of Cu foil+Ni foil and the diffusion affected zone on the ADAM 17-4PH stainless steel side (DAZ 2). When the diffusion bonding temperature is 960 ℃, CuTi+CuTi₂ eutectic phase and CuTi₂, Ti (Cu, Ni), α-Ti phases are generated in the IRZ 2, with the highest shearing strength of 163 MPa. With the diffusion bonding temperature increases from 920 ℃ to 960 ℃, the width of interface increases from 243.5 μm to 278.2 μm and the maximum microhardness of IRZ 2 decreases from 693 HV0.1 to 612 HV0.1 in the case of Cu foil+Ni foil as interlayers. When the diffusion bonding temperature remains constant (960 ℃), the peak microhardness of the diffusion bonded joint with Cu foil+Ni foil as interlayers is the highest, about 612 HV0.1, while that with Ni foil as interlayer is the lowest, approximately 495 HV0.1, in the IRZ.

Key words: atomic diffusion additive manufacturing, 17-4PH stainless steel, TC4 titanium alloy, diffusion bonding, interfacial microstructure

CLC Number:

TG454

Wang Lixiang, Liu Kun, Li Jie, Lu Sheng, Xu Cong, Chen Dongjun. Interfacial microstructure of diffusion bonded joints of TC4 titanium alloy and additive manufactured 17-4PH stainless steel and effect of process parameters[J]. Heat Treatment of Metals, 2024, 49(11): 53-59.

References

[1]Yang M, Wu X, Gong X, et al. Interfacial microstructure and mechanical properties of TC4 titanium alloy/316L stainless steel joint brazed with Ag_70.5Cu_27.5Ti₂ filler metal[J]. Transactions of the Indian Institute of Metals, 2021, 74(8): 1907-1916.
[2]Zhang H, Li J, Ma P, et al. Study on microstructure and impact toughness of TC4 titanium alloy diffusion bonding joint[J]. Vacuum, 2018, 152: 272-277.
[3]刘坤, 李亚江, 王娟. Super-Ni叠层复合材料与钛合金过渡液相扩散焊界面组织特征[J]. 焊接学报, 2018, 39(6): 57-60.
Liu Kun, Li Yajiang, Wang Juan. Interfacial microstructure of transient liquid phase diffusion bonding joint of super-Ni laminated composites to titanium alloy[J]. Transactions of the China Welding Institution, 2018, 39(6): 57-60.
[4]Adomako N K, Noh S, Oh C S, et al. Laser deposition additive manufacturing of 17-4PH stainless steel on Ti-6Al-4V using V interlayer[J]. Materials Research Letters, 2019, 7(7): 259-266.
[5]Claire G, Marae D J, Abdelhamid H, et al. 2D characterization at submicron scale of crack propagation of 17-4PH parts produced by atomic diffusion additive manufacturing (ADAM) process[J]. Procedia Structural Integrity, 2021, 34: 13-19.
[6]Lawrence B D, Henry T C, Phillips F, et al. High-cycle tension-tension fatigue performance of additively manufactured 17-4 PH stainless steel[J]. The International Journal of Advanced Manufacturing Technology, 2023, 126(1/2): 777-786.
[7]Tillmann W, Henning T, Wojarski L. Vacuum brazing of 316L stainless steel based on additively manufactured and conventional material grades[J]. IOP Conference Series: Materials Science and Engineering, 2018, 373: 012023.
[8]刘世锋, 魏钢, 王岩, 等. 增材制造17-4PH马氏体不锈钢研究进展[J]. 中国冶金, 2022, 32(6): 15-25.
Liu Shifeng, Wei Gang, Wang Yan, et al. Research progress on additive manufacturing of 17-4PH martensitic stainless steel[J]. China Metallurgy, 2022, 32(6): 15-25.
[9]李帅, 夏月庆, 王星星, 等. 钛合金/钢异种材料熔化焊研究现状[J]. 材料导报, 2022, 36(14): 188-194.
Li Shuai, Xia Yueqing, Wang Xingxing, et al. Research status for the fusion welding between titanium alloy and steel[J]. Materials Reports, 2022, 36(14): 188-194.
[10]Li J, Wang H, Liu K, et al. Effect of laser power on the microstructure and property of ZrB₂/ZrC in-situ reinforced coatings on zirconium alloy by laser cladding[J]. Vacuum, 2023, 213: 112104.
[11]Li P, Li C, Dong H, et al. Vacuum diffusion bonding of TC4 titanium alloy to 316L stainless steel with AlCoCrCuNi₂ high-entropy alloy interlayer[J]. Journal of Alloys and Compounds, 2022, 909: 164698.
[12]刘坤, 王俊迪, 黄伟奔, 等. 叠层材料与钛合金扩散焊界面裂纹形态及萌生扩展机理[J]. 江苏科技大学学报(自然科学版), 2022, 36(6): 39-44.
Liu Kun, Wang Jundi, Huang Weiben, et al. Interfacial crack morphology, initiation and propagation mechanism of diffusion bonding laminated composite to titanium alloy[J]. Journal of Jiangsu University of Science and Technology (Natural Science Edition), 2022, 36(6): 39-44.
[13]Galati M, Minetola P. Analysis of density, roughness, and accuracy of the atomic diffusion additive manufacturing (ADAM) process for metal parts[J]. Materials, 2019, 12(24): 4122.
[14]Pablo B, Rubén P, Mario D M. Evaluation of the performance of atomic diffusion additive manufacturing electrodes in electrical discharge machining[J]. Materials, 2022, 15(17): 5953.
[15]Tahsin T O, Andrew B, Juan I A, et al. The effect of surface and post-processing on mechanical properties of 17-4PH stainless steel produced by the atomic diffusion additive manufacturing process (ADAM)[J]. The International Journal of Advanced Manufacturing Technology, 2024, 130: 4053-4066.
[16]Xu Ruiwen, Dong Pengpeng, Tang Liang, et al. Interface evolution behaviors and shear strength of vacuum diffusion bonded 45 steel/additive manufactured 316L stainless steel joints[J]. Journal of Materials and Research and Technology, 2024, 30: 8553-8562.
[17]Xu Ruiwen, Zhu Yi, Li Bingnan, et al. Interface behaviors and mechanical properties of diffusion bonded 45 steel/additive manufactured 316L steel joints[J]. Journal of Materials and Research and Technology, 2024, 30: 1279-1287.
[18]李佳, 盛光敏, 黄利. Ti/Nb作中间层脉冲加压扩散连接TiC金属陶瓷与不锈钢[J]. 材料工程, 2017, 45(3): 54-59.
Li Jia, Sheng Guangmin, Huang Li. Impulse pressuring diffusion bonding of TiC cermet to stainless steel using Ti/Nb interlayer[J]. Journal of Materials Engineering, 2017, 45(3): 54-59.
[19]Jian S, Liu K, Li J, et al. Effect of interlayer on interfacial microstructure and properties of Ni80Cr20/TC4 vacuum diffusion bonded joint[J]. Vacuum, 2023, 208: 111738.
[20]Negemiya A, Selvarajan R, Sonar T. Effect of diffusion bonding time on microstructure and mechanical properties of dissimilar Ti6Al4V titanium alloy and AISI 304 austenitic stainless steel joints[J]. Materials Testing, 2023, 65(1): 77-86.
[21]Thirunavukatasu G, Kundu S. High-strength diffusion-bonded joints of 17-4 stainless steel and T64 alloy using nickel and copper bilayer[J]. Journal of Materials Engineering and Performance, 2019, 29(1): 515-528.
[22]Johnson B C, Bauer C L, Jordan A G. Mechanisms of interdiffusion in copper/nickel thin-film couples[J]. Journal of Applied Physics, 1986, 59(4): 1147-1155.
[23]Wierzba B, Skibinski W. The interdiffusion in copper-nickel alloys[J]. Journal of Alloys and Compounds, 2016, 687: 104-108.