Materials Science · Mechanical Behaviour of Materials · Electron Microscopy

Kevin Jacob, PhD

I am a materials scientist working to understand how materials behave under extreme environments such as nuclear irradiation, high strain rates, and high temperatures. I am currently a Postdoctoral Research Scholar at Iowa State University. I completed my Ph.D. at IIT Bombay, where I worked on the precipitation and deformation behaviour of maraging steels subjected to different levels of strain.

My research centers on the quantitative, multiscale mechanical characterization of materials in extreme environments, combining mechanical testing with advanced microscopy to connect deformation mechanisms from individual grains to industrially relevant length scales.

The discovery involved in solving problems of real consequence to the world, and the opportunity to mentor the next generation of researchers and pass that knowledge forward, are what keep me motivated on this journey.

Kevin Jacob

Research interests

  • Processing–microstructure–property relationships in extreme-environment alloys
  • Advanced microscopy (TEM / APT) and in-situ mechanical testing
  • Radiation-tolerant and high-temperature structural materials
  • Small-scale mechanical testing and nanomechanics
  • Phase transformations in thin films

Multi-scale mechanical testing: micropillar compression, micro-tensile testing, orientation-resolved spherical nanoindentation, and bulk DIC strain mapping Click to enlarge ↗

Multi-scale mechanical testing

From µm to mm, I bridge the micro, meso, and macro length scales to understand how a material’s microscopic structure dictates its overall performance. High-throughput nanoindentation makes it possible to map mechanical behaviour rapidly across many orientations and phases, and to test materials available only in tiny volumes (from neutron-irradiated samples too hazardous to handle in bulk, to rare fossilised and meteoritic specimens).

Advanced microscopy: atom probe tomography, transmission electron microscopy, scanning electron microscopy, and electron backscatter diffraction Click to enlarge ↗

Advanced microscopy

From single atoms to bulk grain structure, I use correlative microscopy to resolve a material’s structure across scales using atom probe tomography for precipitate composition and morphology, transmission electron microscopy for lattice and interface analysis, and SEM and EBSD for microstructure and phase distribution. Combining them on the same material links chemistry and structure directly to mechanical behaviour.



Effect of orientation on deformation behaviour of BCC metals

⟨111⟩ orientation
⟨113⟩ orientation

In-situ SEM micropillar compression of tantalum (BCC) in two crystallographic orientations. The orientation of the loading axis relative to the available slip systems changes how the pillar deforms: multiple, equally active slip planes in the ⟨111⟩ orientation, versus single-slip deformation in the ⟨113⟩ orientation.


Effect of defects on deformation behaviour of materials

Multiple single slip deformations in single-crystalline material
Fracture in irradiated material due to the presence of defects

Education & positions

Download full CV (PDF)
Feb 2023 – present

Postdoctoral Researcher, Iowa State University

Materials Science & Engineering. Advisor: Dr. Sid Pathak. Deformation mechanisms and phase transformations in advanced structural materials using nanomechanical testing and advanced microscopy.

2017 – 2023

Ph.D., Metallurgical Engineering & Materials Science — IIT Bombay

Advisor: Dr. Nagamani Jaya Balila. Effect of deformation processing on the mechanical and precipitation behaviour of maraging steels.

2015 – 2017

M.Tech, Metallurgical & Materials Engineering — NIT Rourkela

Fatigue crack initiation from holes. GPA 9.2/10; Silver Medalist, Department Topper 2017.

2010 – 2014

B.Tech, Mechanical Engineering — Mar Baselios College of Engineering & Technology

CFD analysis of flame in a burner.

Selected publications

2026
S. Najmabad, K. Jacob, S. Pathak, C. Bronkhorst, M. Knezevic · International Journal of Mechanical Sciences
2026
K. Jacob, N.P. Atale, E. Shimak, J. Wanni, M. Knezevic, D.J. Thoma, C. Bronkhorst, S. Pathak · Materials Characterization
2023
K. Jacob, H. Khanchandani, S. Dixit, B.N. Jaya · Metallurgical and Materials Transactions A
2021
K. Jacob, D. Yadav, S. Dixit, A. Hohenwarter, B. Nagamani · Materials Science & Engineering: A · 802, 140665
Patent
pending
Alloy powder compositions for gas atomization reaction synthesis to make oxide-dispersion-strengthened alloys
I. Anderson, T. Riedemann, R. Napolitano, E. Cockburn, E. Rinko, J. Tiarks, K. Jacob, Z. Lyu · U.S. Utility Patent (filed 2025, pending) · ISURF Ref. 5715

A selection of first-author and key contributions. Author names in bold indicate first-author work. My full publication list and conference presentations are in my CV.

Honors & awards

2023
Best Poster Award
“Effect of HPT Processing on Fracture Behaviour of Maraging Steels” · International Conference on Fracture (ICF), Atlanta, Georgia
2022
Best Poster Award
“Failure Behaviour of Nanostructured Maraging Steels” · 19th ICSMA, Metz, France
2021
Best Oral Presentation
“Effect of HPT Processing on Deformation Behaviour of Maraging Steel 250” · 75th NMD-ATM, Indian Institute of Metals, IIT Bombay
2021
Best Microstructure Award (TEM & APT category)
75th NMD-ATM, Indian Institute of Metals, IIT Bombay
2017
Silver Medalist & Department Topper
NIT Rourkela

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