3d printing of stainless steel 316L and its weldability for corrosive environments

Venkata Krishnan Sampath, Praveen Silori, Parth Paradkar, Stanislau Niauzorau, Aliaksandr Sharstniou, Amm Hasib, Samuel Villalobos, Bruno Azeredo

Research output: Contribution to journalArticlepeer-review

Abstract

Critical to its successful deployment, metal 3D printed parts must demonstrate not only corrosion resistance to operate in harsh environments but also good weldability to existing assets for installation and long-term durability. To address this issue, this paper evaluates the corrosion resistance of additively manufactured Stainless Steel (SS) 316 L via Laser powder bed fusion (L-PBF) and its weldability to its wrought counterpart under corrosion distress. First, 3D printed pellets are separately characterized by accelerated corrosion testing (i.e. chronoamperometry, cyclic potentiodynamic polarization and electrochemical impedance spectroscopy) following ASTM standards, and its improved corrosion resistance is demonstrated and compared to its wrought counterpart. Next, to evaluate the weldability, 3D printed SS 316 L plates are welded to wrought counterparts, dissimilar welded joints dog-bone specimens are machined from it and submitted for uniaxial mechanical tensile testing. When compared against similar welded joints wrought dog-bone specimens (i.e. wrought on both halves), dissimilar welded joints dog-bone specimens exhibit 36.02% less ducility and 12.59% lower yield strength, and those values reduce to 74.65% and 27.29%, respectively, when the former undergoes accelerated corrosion. These results evaluate 3D printed SS 316 L parts against wrought for applications as replacement parts in harsh environments that require welding for installation.

Original languageEnglish (US)
Article number142439
JournalMaterials Science and Engineering A
Volume833
DOIs
StatePublished - Jan 26 2022

Keywords

  • Corrosion resistance
  • Harsh environments
  • Metal additive manufacturing
  • Weldability

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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