EMIT Lab

The EMIT lab (Engineering MaterIals for Transformative technologies) at CMU run by Sneha Narra focuses on advancing metal additive manufacturing knowledge to manufacture light-weight organic designs and utilize novel, advanced materials. At a scientific level, our group studies the fundamentals of additive manufacturing processes, investigates the resulting material microstructure and properties, and develops process design paradigms. Our group’s mission is to lower the carbon footprint, primarily in aerospace, automobile, and energy industries. This will be achieved either through reduced material and/or operational usage or through enabling transformative technologies, such as nuclear fusion and high-efficiency turbine systems.

Faculty

Sneha Prabha Narra

Sneha Prabha Narra

Assistant Professor, Mechanical Engineering

Courtesy appointment, Materials Science & Engineering

Sneha Narra’s academic training and experience has led to the establishment of the EMIT lab, working at the intersection of mechanical and materials science and engineering and leveraging data-driven methods to expand advanced manufacturing capabilities.

As an instructor, Narra’s goal is to help her students learn effectively in a comfortable environment and spark interest in them to explore outside the classroom. To meet this goal, she adopts a teaching philosophy that builds on creating an inclusive learning environment, active participation from students, learning through real-world examples and demonstrations, and assessment techniques optimized for long-term retention and exploration. Outside the classroom, Narra is passionate about mentoring women in engineering. Specifically, she participates in outreach activities, educates students about professional development opportunities, and provides opportunities to conduct research in interdisciplinary topics.

Office
1313 Wean Hall
Email
snarra@andrew.cmu.edu
Google Scholar
Sneha Prabha Narra

Open Ph.D. positions for research projects

Sneha Narra is looking for students with a background in mechanical and/or materials science and engineering and an interest in metal additive manufacturing to work on any of the following projects. M.S. students interested in pursuing independent study, conducting thesis research, and/or transitioning to a Ph.D. program are encouraged to apply. If interested, please send your resume and unofficial transcript to snarra@andrew.cmu.edu.

Topics

  • Data-driven modeling to predict critical defect size in additively manufactured Ti-6Al-4V
  • Investigate the effects of local and global thermal fields on as-fabricated defects and microstructure
  • Processing parameter and processing gas interactions in laser powder bed fusion additive manufacturing
  • Assessing the feasibility of large-scale additive manufacturing of nitrogen-strengthened steels

Projects

Research team

Tharun Reddy

Tharun Reddy

Doctorate

Email
tharunreddy@cmu.edu
William Frieden Templeton

William Frieden Templeton

Doctorate

Ryan Utz

Ryan Utz

Doctorate

Co-Advisor
Jack Beuth
Email
rru@andrew.cmu.edu
Samantha Castellano

Samantha Castellano

Undergraduate

Email
scastell@andrew.cmu.edu
Meenakshi Sundrum

Meenakshi Sundrum

Undergraduate

Email
msundrum@andrew.cmu.edu
Brenna Slomsky

Brenna Slomsky

Undergraduate

Email
bslomsky@andrew.cmu.edu
Charlotte Ng

Charlotte Ng

Undergraduate

Email
cbng@andrew.cmu.edu

Courses

Course Course Name Location Units Semester Offered
24-632 Special Topics: Additive Manufacturing Processing and Product Development Pittsburgh 12 Fall
24-633 Additive Manufacturing Laboratory Pittsburgh 12 Spring
24-651 Material Selection for Mechanical Engineers Pittsburgh 12 Spring

Graduate students currently advised at WPI

  • Yao Xu, Ph.D. student, Aug 2018–present, co-advised with Professor Brajendra Mishra

  • Hanshen Yu, Ph.D. student, June 2020-present, co-advised with Professor Jamal Yagoobi

Alumni

Graduate students

  • Mahya Shahabi, Aug 2019 – May 2021, currently a Ph.D. student at WPI
  • Prajwal Bharadwaj, January 2021 – May 2021, currently a Ph.D. student at WPI
  • Krishnan Giridharan, October 2019 – May 2021, currently an associate engineer at Rivian
  • Dylan McKillip,  August 2019 – May 2020, currently a test engineer at Brooks Automation

Undergraduate students

  • John Trainor, aerospace engineering class of 2021 (WPI), currently a design engineer at Triton Space Technologies, LLC
  • Nathaniel Rutkowski, aerospace engineering class of 2021 (WPI), currently a propulsion engineer at Firehawk Aerospace
  • Kaitlin Barron, mechanical engineering class of 2022 (WPI)
  • Shannon O’Connor, mechanical engineering class of 2022 (WPI), NASA LaRC summer intern (additive manufacturing research), Summer and Fall 2021
  • Caitlin Kean, mechanical engineering class of 2022 (WPI)
  • Nathan Maldonado, mechanical engineering class of 2022 (WPI)
  • Daniel Marsh, mechanical engineering class of 2022 (WPI)
  • Adrianna Yuen, mechanical engineering class of 2024 (WPI)

Publications

Sneha P. Narra, Ziheng Wu, Rahi Patel, Joe Capone, Muktesh Paliwal, Jack Beuth, Anthony Rollett. “Use of Non-Spherical Hydride-Dehydride (HDH) Powder in Powder Bed Fusion Additive Manufacturing.” Additive Manufacturing, v.34, 101188, August 2020. (journal article)

Sneha P. Narra, Ross Cunningham, Jack Beuth, Anthony D. Rollett. “Location specific solidification microstructure control in electron beam melting of Ti-6Al-4V.” Additive Manufacturing, v. 19: pp. 160-166, January 2018. (journal article)

Jerard V. Gordon, Sneha P. Narra, Ross W. Cunningham, He Liu, Hangman Chen, Robert M Suter, Jack L Beuth, Anthony D Rollett. “Defect structure process maps for laser powder bed fusion additive manufacturing.” Additive Manufacturing, v. 36, 101552, December 2020. (journal article)

Ross Cunningham, Sneha P. Narra, Colt Montgomery, Jack Beuth, AD Rollett. “Synchrotron-Based X-ray Microtomography Characterization of the Effect of Processing Variables on Porosity Formation in Laser Power-Bed Additive Manufacturing of Ti-6Al-4V.” Journal of Medicine, v. 69, pp. 479–484, January 2017. (journal article

Ming Tang, P. Chris Pistorius, Sneha Narra, Jack L Beuth. “Rapid Solidification: Selective Laser Melting of AlSi10Mg.” Journal of Medicine, v. 68, pp. 960–966, January 2016. (journal article

Rianne E Laureijs, Jaime Bonnín Roca, Sneha Prabha Narra, Colt Montgomery, Jack L Beuth, Erica RH Fuchs. “Metal Additive Manufacturing: Cost Competitive Beyond Low Volumes.” ASME Journal of Manufacturing Science and Engineering, v. 139(8), 081010, August 2017. (journal article)

Sneha Narra’s most recent list of publications can be found on Google Scholar.

Media mentions

Mechanical Engineering

Metal 3D printing across scales

New faculty member Sneha Prabha Narra is interested in utilizing recent advances in in-situ monitoring, process modeling, and fundamentals of welding to advance the use of wire arc additive manufacturing for new applications and materials.