Hydrogen-enabled microstructure and fatigue strength engineering of titanium alloys
- Univ. of Utah, Salt Lake City, UT (United States); United States Army Research Lab., Aberdeen Proving Ground, MD (United States)
- Univ. of Utah, Salt Lake City, UT (United States)
- United States Army Research Lab., Aberdeen Proving Ground, MD (United States)
Traditionally, titanium alloys with satisfactory mechanical properties can only be produced via energy-intensive and costly wrought processes, while titanium alloys produced using low-cost powder metallurgy methods consistently result in inferior mechanical properties, especially low fatigue strength. Herein, we demonstrate a new microstructural engineering approach for producing low-cost titanium alloys with exceptional fatigue strength via the hydrogen sintering and phase transformation (HSPT) process. The high fatigue strength presented in this work is achieved by creating wroughtlike microstructures without resorting to wrought processing. This is accomplished by generating an ultrafine-grained as-sintered microstructure through hydrogen-enabled phase transformations, facilitating the subsequent creation of fatigue-resistant microstructures via simple heat treatments. Finally, the exceptional strength, ductility, and fatigue performance reported in this paper are a breakthrough in the field of low-cost titanium processing.
- Research Organization:
- Univ. of Utah, Salt Lake City, UT (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office
- Grant/Contract Number:
- EE0005761
- OSTI ID:
- 1347520
- Journal Information:
- Scientific Reports, Vol. 7; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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journal | January 2020 |
Powder metallurgy of titanium – past, present, and future
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journal | August 2017 |
Fabrication of Ti from a blend of Ti and TiH 2 powders via powder metallurgy processing
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journal | September 2019 |
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