U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Michael Mengason (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 1 - 8 of 8

Crack Networks and Chemistry in Pyrrhotite-Affected Concrete Extracted from a Massachusetts Site

August 2, 2026
Author(s)
Patrick Dixon, Michael Mengason, David Goodwin, Thomas Russo, Ashley Carey, Osamah Dehwah, Stephanie Watson
Homes in areas of Massachusetts are experiencing issues with crumbling foundations due to pyrrhotite, similar to homes in northeastern Connecticut. A basement of a Massachusetts residential home, built in the mid-1990s, experiencing pyrrhotite-driven

Crack Formation Modeling in Concrete Affected by Iron-Sulfide Reactions

June 24, 2026
Author(s)
Osamah Dehwah, Nicos Martys, Edward Garboczi, Michael Mengason, Patrick Dixon, Stephanie Watson
Damage in concrete containing sulfide-bearing aggregates has become a critical issue in several countries such as the USA, Canada, and Ireland. This deterioration unfolds over decades and is driven by oxidation reactions in sulfide-bearing aggregates

Pyrrhotite Reference Material Synthesis

April 4, 2025
Author(s)
Michael Mengason, Stephanie Watson
The mineral pyrrhotite was synthesized from iron and sulfur starting materials for one component in a four-component reference material (RM 8154-Pyrrhotite in Concrete) to be used to evaluate the presence of sulfur in aggregate (crushed rock) and concrete

Diffusion in the Ti-Al-V system

August 23, 2018
Author(s)
Greta Lindwall, Kil-Won Moon, Zhangqi Chen, Michael J. Mengason, Maureen E. Williams, Justin Gorham, Ji-Cheng Zhao, Carelyn E. Campbell
Diffusion in the Ti-Al-V system is studied and a CΑLPHAD diffusion mobility description is developed. Diffusion couple experiments are used to obtain information of Al and V diffusion in the α phase. This includes diffusion paths at the temperatures 923 K

EDS Microanalysis: Pushing the Limits

June 1, 2018
Author(s)
Nicholas Ritchie, Dale E. Newbury, Michael Mengason, Heather Lowers
It is a great time to be a microanalyst. After a few decades of incremental progress in energy dispersive X-ray spectrometry (EDS), the last decade has seen the accuracy and precision surge forward. Today, the question is not whether EDS is generally

SEM/EDS Trace Analysis: Limits Imposed by Fluorescence of the Detector

August 4, 2017
Author(s)
Dale E. Newbury, Nicholas W. Ritchie, Michael J. Mengason, Keana C. Scott
Elemental trace analysis by electron-excited x-ray spectrometry performed in the scanning electron microscope (SEM) with energy dispersive x-ray spectrometry (EDS) can reach a limit of detection of 0.0005 mass fraction for many elements. Exceptions include
Was this page helpful?