Microstructural and properties evolution of austenitic heat resistant steel after addition of aluminium
(2013) In Materials Science and Technology (United Kingdom) 29(5). p.511-516- Abstract
Effect of aluminium on microstructure and properties of austenitic heat resistant steel was investigated. The results showed that Al addition led to formation of spheroidal and dispersed Ni3Al. After solution treatment, Ni3Al particles experienced a significant refinement from 1.5 μm to nanoscale (∼80 nm). Matrix transformed from austenite to ferrite when addition of Al was >4.72%. Oxidation resistance of samples containing 4.72%Al was two times higher than Al free samples due to the formation of compacted Al2O3 scales. Excessive Al resulted in the formation of Al3Fe5O12 and AlN on oxidation surface, which destroyed the oxidation resistance. Dispersedly... (More)
Effect of aluminium on microstructure and properties of austenitic heat resistant steel was investigated. The results showed that Al addition led to formation of spheroidal and dispersed Ni3Al. After solution treatment, Ni3Al particles experienced a significant refinement from 1.5 μm to nanoscale (∼80 nm). Matrix transformed from austenite to ferrite when addition of Al was >4.72%. Oxidation resistance of samples containing 4.72%Al was two times higher than Al free samples due to the formation of compacted Al2O3 scales. Excessive Al resulted in the formation of Al3Fe5O12 and AlN on oxidation surface, which destroyed the oxidation resistance. Dispersedly precipitated Ni3Al effectively supported the matrix and enhanced the wear resistance, and samples containing 4.72%Al performed,80% higher in wear resistance than Al free samples. Al significantly improved the microstructure and the properties of austenitic heat resistant steel, and samples containing 4.72%Al performed the optimal combination properties.
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- author
- Sun, Y. F. ; Lv, Y. Z. LU ; Zhang, Y. ; Zhao, J. Y. and Wu, Y.
- publishing date
- 2013-05
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Heat resistant steel, Microstructural evolution, NiAl, Oxidation, Wear
- in
- Materials Science and Technology (United Kingdom)
- volume
- 29
- issue
- 5
- pages
- 6 pages
- publisher
- Taylor & Francis
- external identifiers
-
- scopus:84876935905
- ISSN
- 0267-0836
- DOI
- 10.1179/1743284712Y.0000000177
- language
- English
- LU publication?
- no
- id
- 823ce8d6-18f2-4bf9-8429-9e385300d1d6
- date added to LUP
- 2021-10-18 21:54:56
- date last changed
- 2022-02-24 17:00:23
@article{823ce8d6-18f2-4bf9-8429-9e385300d1d6, abstract = {{<p>Effect of aluminium on microstructure and properties of austenitic heat resistant steel was investigated. The results showed that Al addition led to formation of spheroidal and dispersed Ni<sub>3</sub>Al. After solution treatment, Ni<sub>3</sub>Al particles experienced a significant refinement from 1.5 μm to nanoscale (∼80 nm). Matrix transformed from austenite to ferrite when addition of Al was >4.72%. Oxidation resistance of samples containing 4.72%Al was two times higher than Al free samples due to the formation of compacted Al<sub>2</sub>O<sub>3</sub> scales. Excessive Al resulted in the formation of Al<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> and AlN on oxidation surface, which destroyed the oxidation resistance. Dispersedly precipitated Ni<sub>3</sub>Al effectively supported the matrix and enhanced the wear resistance, and samples containing 4.72%Al performed,80% higher in wear resistance than Al free samples. Al significantly improved the microstructure and the properties of austenitic heat resistant steel, and samples containing 4.72%Al performed the optimal combination properties.</p>}}, author = {{Sun, Y. F. and Lv, Y. Z. and Zhang, Y. and Zhao, J. Y. and Wu, Y.}}, issn = {{0267-0836}}, keywords = {{Heat resistant steel; Microstructural evolution; NiAl; Oxidation; Wear}}, language = {{eng}}, number = {{5}}, pages = {{511--516}}, publisher = {{Taylor & Francis}}, series = {{Materials Science and Technology (United Kingdom)}}, title = {{Microstructural and properties evolution of austenitic heat resistant steel after addition of aluminium}}, url = {{http://dx.doi.org/10.1179/1743284712Y.0000000177}}, doi = {{10.1179/1743284712Y.0000000177}}, volume = {{29}}, year = {{2013}}, }