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Achieving exceptional wear resistance in a compositionally complex alloy via tuning the interfacial structure and chemistry
- Source :
- Acta Materialia. 188:697-710
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Titanium alloys have been widely used for medical devices and structural applications. However, conventional titanium alloys often suffer from low resistance to wear, particularly at elevated temperatures. Herein, an equiatomic TiMoNb compositionally complex alloy (CCA) is shown to exhibit wear resistance comparable to alumina at room temperature (RT). Even at 600 °C, the alloy still shows an extremely low wear rate of the order of 10−6 mm3/(N·m). The remarkable wear resistance is achieved via tuning the interfacial structure and chemistry in TiMoNb CCA, including nanostructuring, titanium segregation at the grain boundaries, and the formation of a high density of nanoscale coherent Ti-rich precipitates with cube-on-cube orientation relationship with the ultrafine-grained matrix. The present results provide significant insights into the design of novel alloys for service in harsh environments.
- Subjects :
- Imagination
Chemical substance
Materials science
Polymers and Plastics
media_common.quotation_subject
Alloy
chemistry.chemical_element
02 engineering and technology
engineering.material
01 natural sciences
0103 physical sciences
Composite material
Nanoscopic scale
media_common
010302 applied physics
Metals and Alloys
Titanium alloy
021001 nanoscience & nanotechnology
Electronic, Optical and Magnetic Materials
chemistry
Ceramics and Composites
engineering
Grain boundary
0210 nano-technology
Science, technology and society
Titanium
Subjects
Details
- ISSN :
- 13596454
- Volume :
- 188
- Database :
- OpenAIRE
- Journal :
- Acta Materialia
- Accession number :
- edsair.doi...........6349663c460d16bbc612a9797fd324b4