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An investigation into microstructure and high-temperature mechanical properties of selective laser-melted 316L stainless steel toward the development of hybrid Ampliforge process

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Abstract

The most prevalent hybrid additive manufacturing (HAM) method in the industry involves the combination of conventional processes, such as hot isostatic pressing or forging. In this way, a part is printed to its near-net-shape by additive manufacturing and then finished using open forge (Ampliforge). Hereby, the performance of the printed part will be improved by the downstream processes; this method also affords a reduction in time, cost, and waste material. In this study, the AISI 316L stainless steel parts were produced through selective laser melting (SLM) process and the cellular structure with columnar grains appeared. Then, hot compression experimental works were performed to investigate flow behavior, hot workability, density, and microstructure evolutions during the process. This process resulted in a near fully-dense part with a homogeneous microstructure without anisotropy of properties and higher hot deformation activation energy and peak stress in comparison with similar conventionally manufactured stainless steel.

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Authors and Affiliations

  1. Hot Deformation and Thermomechanical Processing Laboratory of High-Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran

    Armin Habibiyan & Abbas Zarei Hanzaki

  2. School of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran

    Hamid Reza Abedi

Authors
  1. Armin Habibiyan
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  2. Abbas Zarei Hanzaki
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  3. Hamid Reza Abedi
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Correspondence to Abbas Zarei Hanzaki or Hamid Reza Abedi.

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Habibiyan, A., Hanzaki, A.Z. & Abedi, H.R. An investigation into microstructure and high-temperature mechanical properties of selective laser-melted 316L stainless steel toward the development of hybrid Ampliforge process. Int J Adv Manuf Technol 110, 383–394 (2020). https://doi.org/10.1007/s00170-020-05870-1

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