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Additive manufacturing presents a promising avenue for the fabrication of intricate structures comprising metals, polymers, ceramics, and various other materials. Inconel and Ti-based alloys are renowned for their resilience in extreme environmental conditions. Bimetallic structures, representing a subset of multi-material constructions, offer tailored solutions to diverse engineering challenges. This study concentrates on leveraging Wire Arc Additive Manufacturing (WAAM) technology to produce bimetallic structures using Inconel 82 and Ti6Al4V (Ti64) alloys. Challenges such as delamination and other complications stem from the disparate thermal characteristics between Inconel 82 and Ti64 alloys, exacerbated by the formation of brittle intermetallic phases at the interface. The following phase identified: α-Ti and β-Ti transitioning to α-Ti, β-Ti, and Ti2Ni, further progressing to β-Ti, Ti2Ni, TiNi, and γ-Ni. The bimetallic structures underwent comprehensive characterization employing Vickers hardness tests, X-ray diffraction (XRD), scanning electron microscopy (SEM), and scratch testing. The microhardness varies from 319 to 562 HV, during the scratch test 10.11 and 9.854 coefficient of friction fond at 30 N and 40 N load respectively. Evaluation of the interface between the two materials revealed the presence of delamination due to intermetallic compound formed between both metals.

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Interfacial Characteristics of Ti64–In82 Bimetallic Structure Fabricated Using Wire-Arc Additive Manufacturing

  • 会议论文

  • 发表日期：

    2025年

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  • Rupendra Singh Tanwar,
  • Swaraj Sarkar,
  • Suyog Jhavar

摘要

Additive manufacturing presents a promising avenue for the fabrication of intricate structures comprising metals, polymers, ceramics, and various other materials. Inconel and Ti-based alloys are renowned for their resilience in extreme environmental conditions. Bimetallic structures, representing a subset of multi-material constructions, offer tailored solutions to diverse engineering challenges. This study concentrates on leveraging Wire Arc Additive Manufacturing (WAAM) technology to produce bimetallic structures using Inconel 82 and Ti6Al4V (Ti64) alloys. Challenges such as delamination and other complications stem from the disparate thermal characteristics between Inconel 82 and Ti64 alloys, exacerbated by the formation of brittle intermetallic phases at the interface. The following phase identified: α-Ti and β-Ti transitioning to α-Ti, β-Ti, and Ti2Ni, further progressing to β-Ti, Ti2Ni, TiNi, and γ-Ni. The bimetallic structures underwent comprehensive characterization employing Vickers hardness tests, X-ray diffraction (XRD), scanning electron microscopy (SEM), and scratch testing. The microhardness varies from 319 to 562 HV, during the scratch test 10.11 and 9.854 coefficient of friction fond at 30 N and 40 N load respectively. Evaluation of the interface between the two materials revealed the presence of delamination due to intermetallic compound formed between both metals.