top of page
fIG. 8.png

RESEARCH PROJECTS

Shear extrusion of magnesium alloy and corrosion behaviour

  • In collaboration with Pacific Northwest National Laboratory performed shear extrusion of various magnesium alloy (AZ31, ZK60, Mg-3Si)

  • Aimed to improve mechanical and corrosion resistance of alloys via shear extrusion processing

  • Analyzed detailed microstructure evolution such as grain size, texture, second phases, solute partitioning, and residual strain

  • Investigated mechanical and corrosion response of shear extruded alloys in comparison to cast and wrought counterparts 

  • Characterized and understood the underlying mechanism for property variation

fIG. 5.png

Role of deformation history on corrosion

fig.1.png

  • Performed electrochemical and microstructural characterizations to assess the role of mechanical deformation on the corrosion behavior of the aluminum 5083 alloy

  • Explored the microstructural variation such as second phase particle and grain size fragmentation through SEM & EBSD techniques. 

  • Investigated corrosion behavior of deformed and undeformed alloy through various electrochemical tests (OCP, PP, CV) and quasi-in-situ post corrosion microstructural analysis.  

  • Proposed underlying corrosion mechanism by correlating post corrosion microstructure and electrochemical results 

Microstructure, interdiffusion & failure analysis of brazed joint

  • Designed and improved brazing of steel-aluminum bronze and steel-silver at different brazing temperatures by nickel coating

  • Characterized and analyzed the microstructure evolved across the joint with various techniques (SEM, XRD, EPMA, EDS, DSC, Indentation)

  • Studied interdiffusion of elements across the brazed joint as a function of brazing temperature with EPMA line profile analysis

  • Proposed a mechanism by correlating composition gradient with ternary liquidus projections

  • Performed fractography study on failed brazed lap share joints

fig.3.png

Second phase size and distribution effect on micro-galvanic corrosion

  • Examined the effect of second phase particle (beta-Mg17Al12) fragmentation and radial distribution on localized corrosion susceptibility of magnesium alloy through a numerical study (COMSOL Multiphysics package)

  • Larger fragmentation and higher separation showed lower tendency towards localized corrosion

fig.2.png

Initial texture dependence omega transformation in High Pressure Torsion (HPT)

  • Examined the influence of initial texture on large strain deformation behavior of HCP titanium in HPT

  • Characterized the strain-induced transformation of alpha phase to omega phase via XRD and TEM techniques

  • Evaluated the mechanical response of HPT alloys through hardness and analyzed the interplay between omega transformation and strain accumulation to control the bulk mechanical behaviour 

fIG. 6.png

Gradient nanocomposite layer improved corrosion resistance of aluminum alloy

fig.4.png

  • Designed and created a gradient nanocomposite layer on the aluminum 7075 alloys through surface mechanical attrition treatment (SMAT)

  • Investigated the surface microstructure evolution via various characterization techniques (TEM + EELS, SEM + EDS, EBSD, XRD)

  • Performed a detailed comparative study of corrosion response of SMAT and Base surfaces (EIS, CV, Intergranular corrosion cracking (IGC))

  • Analyzed the post corrosion surface chemistry by surface spectroscopy techniques (Tof-SIMS, XPS)

  • Proposed an underlying mechanism for improved corrosion resistance with SMAT.

ASU multiphysics.JPG
copyright.png

2021 by Vikrant Beura

  • Google Scholar
  • LinkedIn
bottom of page