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Tuning the scale of α precipitates in β-titanium alloys for achieving high strength
- Source :
- Scripta Materialia. 154:139-144
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The strength of a commercial β‑titanium alloy was tuned by systematically controlling the size-scale of α precipitation via two-step heat treatments. While the first step annealing at 350 °C forms the precursor metastable ω phase, the subsequent annealing at 600 °C/1H resulted in fine-scale α precipitation. We find that annealing duration at 350 °C greatly impacts the α size-scale and, this consequently can be used to tune the ultimate tensile strength (UTS) from ~1 to 2 GPa. A combination of high volume-fraction of non-shearable super-refined α precipitates, coupled with their pyramidal arrangement, and a constrained β matrix leads to very high strength.
- Subjects :
- 010302 applied physics
β titanium
Materials science
Annealing (metallurgy)
Precipitation (chemistry)
Mechanical Engineering
Alloy
Metals and Alloys
02 engineering and technology
engineering.material
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Chemical engineering
Mechanics of Materials
Metastability
0103 physical sciences
Ultimate tensile strength
engineering
General Materials Science
0210 nano-technology
Subjects
Details
- ISSN :
- 13596462
- Volume :
- 154
- Database :
- OpenAIRE
- Journal :
- Scripta Materialia
- Accession number :
- edsair.doi...........9f2248f3ae171f1a31aca8d877d6c518