Integrated calorimetry-spectrometry analysis to unravel hydrogen effects on metastable alloys
Abstract
Funds are provided to support the purchase of research instrumentation.Hydrogen embrittlement (HE) in structural alloys presents a critical challenge to a range of industries. This phenomenon is difficult to avoid due to the abundance of hydrogen (H) and the ease with which it diffuses into metals, and equally challenging to characterize as H undergoes complex interactions with various microstructural constituents. What further complicates this scenario is the structural changes induced by H uptake, which can range from dislocation re- arrangements to phase transformations. In order to advance the fundamental understanding in this area, it is thus necessary to simultaneously monitor such microstructural transformations and H activity.This DURIP will enable acquisition of thermal analysis equipment coupled with a mass spectrometer, to be employed for this purpose. The simultaneous differential scanning calorimetry and thermogravimetric analysis provide thermal and mass measurements of a sample undergoing heating or cooling, while the mass spectrometer captures information on H absorption-desorption behavior. Thus, microstructural transformations, which are characterized by thermal fluctuations, can at once be monitored alongside H desorption.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2021
- Source ID
- N000142112509
Entities
People
- Cemal Tasan
Organizations
- Massachusetts Institute of Technology
- Office of Naval Research
- United States Navy