Microstructure, texture, and anisotropic mechanical behavior of selective laser melted maraging stainless steels

Mehdi Sanjari, Mahdi Mahmoudiniya, Hadi Pirgazi, Saeed Tamimi, Mohammad Hossein Ghoncheh, Ayda Shahriairi, Amir Hadadzadeh, Babak Shalchi Amirkhiz, Mackenzie Purdy, Edgar Gomes de Araujo, Leo Kestens, Mohsen Mohammadi

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In present research, the effect of building orientation on microstructure, texture and mechanical properties of a low carbon maraging steel processed by selective laser melting (SLM) technique is studied. The microstructural characterization and grain structure observations of the fabricated samples are conducted using electron microscopies and electron backscatter diffraction. It is observed that by altering the building orientation from vertical to horizontal, the morphology of the grains changes from columnar-dendritic to equiaxed. In addition, a higher volume fraction of austenite is retained in the horizontal sample compared with the vertically printed sample due to a faster cooling rate, higher degree of micro-segregation, and smaller prior austenite grains. Consequently, a higher strength and better ductility are achieved in the horizontally printed sample. The Taylor factorshows that different obtained tensile properties are not related to the crystallographic texture but are affected by grain size, retained austenite, and stress concentration conditions.

Original languageEnglish
Article number112185
JournalMaterials Characterization
Early online date2 Aug 2022
Publication statusPublished - 31 Oct 2022


  • crystallographic texture
  • grain morphology
  • maraging steel
  • mechanical properties
  • selective laser melting (SLM)


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