Microstructure Analysis and Numerical Simulation of Laser Welded Dissimilar Ti Alloy-SS Joint Using V Interlayer
Yuqiang Liu,
Yan Zhang,
Daqian Sun,
Xiaoyan Gu,
Hongmei Li
Issue:
Volume 7, Issue 3, September 2022
Pages:
65-74
Received:
17 April 2022
Accepted:
24 June 2022
Published:
20 July 2022
DOI:
10.11648/j.ijmpem.20220703.11
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Abstract: Pulsed laser welding of TC4 Titanium (Ti) alloy to SUS301L stainless steel (SS) was applied with pure V employed as an interlayer. Microstructures of the joints were studied using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Mechanical properties of the joints were evaluated by performing tensile tests. The two pass welding was employed, and two welding zones were formed. The unmelted V interlayer served as a barrier to mixing of the two base materials in the welding. In the meantime, the unmelted V served as a diffusion barrier between Ti and Fe avoiding formation of the Ti-Fe intermetallics. The temperature field and stress field distributed in laser welding based on Ti alloy-V-SS joint were dynamically simulated using the COMSOL in this study. Given the characteristics of laser welding, a Gauss body heat source was employed in the study to model the laser welding of joint by studying the temperature relativity of the thermal physical parameters of material, as well as the latent heat of fusion. By comparing the simulation results with the corresponding experimental findings, the validity of the numerical model is confirmed.
Abstract: Pulsed laser welding of TC4 Titanium (Ti) alloy to SUS301L stainless steel (SS) was applied with pure V employed as an interlayer. Microstructures of the joints were studied using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Mechanical properties of the joints were evaluated by performing ten...
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Interfacial Microstructure Evolution and Mechanical Properties of Laser Welding Joints for Stainless Steel to TiNi Shape Memory Alloy
Zhijin Guo,
Yan Zhang,
Jianping Zhou,
Daqian Sun,
Hongmei Li
Issue:
Volume 7, Issue 3, September 2022
Pages:
75-84
Received:
17 April 2022
Accepted:
24 June 2022
Published:
20 July 2022
DOI:
10.11648/j.ijmpem.20220703.12
Downloads:
Views:
Abstract: In this paper, laser welding of stainless steel and TiNi shape memory alloy dissimilar materials was carried. Microstructures of the joints were analyzed by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Mechanical properties of the joints were evaluated by tensile tests. Based on avoiding the formation of Ti-Fe intermetallics in the joint, three welding processes for SS-TiNi alloy joint were introduced. The joint A was formed while the laser was acted on the SS-TiNi alloy interface and joint fractured along the SS side in weld immediately after welding without filler metal. The joint B was formed while the laser was acted on the Cu interlayer. Experimental results showed that Cu interlayer was helping to decrease the Ti-Fe intermetallics by forming Ti-Cu phases in the weld. The tensile strength of the joint B was 216 MPa. The joint C was formed while the laser was acted on the SS side 1.0 mm. One process was one pass welding involving creation of a joint with one fusion weld and one brazed weld separated by remaining unmelted SS. The mechanical performance of the joint C was determined by the brazed weld formed at SS-TiNi alloy interface with a tensile strength of 256 MPa.
Abstract: In this paper, laser welding of stainless steel and TiNi shape memory alloy dissimilar materials was carried. Microstructures of the joints were analyzed by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Mechanical properties of the joints were evaluated by tensile tests. Based on avoi...
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