|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Comparison of Hydrogen Introduction Techniques for In-situ TEM Straining Experiments
||Khalid Hattar, Christopher Barr, Daniel Bufford, Brittany Muntifering, Kathryn Small, Ai Leen Koh, Richard Karnesky
|On-Site Speaker (Planned)
Hydrogen embrittlement in pure metals and alloys has been an active area of research for decades; however, the mechanisms behind the loss in mechanical properties remains an area of great interest to researchers. In-situ TEM techniques have proved to be a powerful tool to study the mechanisms governing hydrogen embrittlement in materials, as a function of chemistry, microstructure, and hydrogen environments. In this study, three methods of hydrogen introduction into pure Ni are performed prior to or during in-situ straining in the TEM: i) traditional ex-situ charging in a high pressure chamber, ii) in-situ charging in an environmental TEM, and iii) in-situ proton implantation. The microstructural response during in-situ TEM tensile straining was observed and compared between hydrogen introduction techniques in order to determine any difference in embrittlement mechanism possibly caused by method of hydrogen introduction. In-situ charging in an environmental TEM provided the greatest confidence of direct hydrogen effects.
||Planned: Supplemental Proceedings volume