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Alghannam AA, Soliman MS, Seikh AH, Alnaser IA, Fouly A, Mohammed JA, Ragab SA, Abdo HS. Investigation on mechanical properties and corrosion resistance of Ti-modified AA5083 aluminum alloy for aerospace and automotive applications. Sci Rep 2023; 13:11535. [PMID: 37460619 DOI: 10.1038/s41598-023-38510-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 07/09/2023] [Indexed: 07/20/2023] Open
Abstract
Casting of aluminum with different concentration of alloying elements such as Mg, Mn (similar to that in AA5083) with additional percentages of 0.1, 0.2 and 0.3% Ti, are carried out using graphite crucible. The as-cast microstructure is modified by hot rolling to a thickness of ~ 2 mm. Mechanical and metallurgical and characterization of heat-treated thin sheets are carried out using tensile testing, hardness measurement, metallography, image analysis and optical microscope. By increasing the Ti content, the results show grain refinement and increase in the formation of Al3Ti which reflected positively on the mechanical properties. Specifically, Ultimate tensile strength is increased from 260 MPa (0 wt% Ti) to 345 MPa (0.3 wt% Ti) when using water quenching, 32.6% improvement for air cooling, and 23.3% for furnace cooling. Electrochemical corrosion behavior of heat-treated water quenched, air cooled and furnace cooled samples were tested in 3.5% NaCl solution. The results show that the heat-treated alloys have very good resistance against corrosion, while by increasing the Ti content, the corrosion rate increases due to the grain refinement phenomena.
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Affiliation(s)
- Abdullah A Alghannam
- Mechanical Engineering Department, College of Engineering, King Saud University, 11421, Riyadh, Saudi Arabia
| | - Mahmoud S Soliman
- Mechanical Engineering Department, College of Engineering, King Saud University, 11421, Riyadh, Saudi Arabia
| | - Asiful H Seikh
- Centre of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research, King Saud University, 11421, Riyadh, Saudi Arabia
| | - Ibrahim A Alnaser
- Mechanical Engineering Department, College of Engineering, King Saud University, 11421, Riyadh, Saudi Arabia
- Centre of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research, King Saud University, 11421, Riyadh, Saudi Arabia
| | - Ahmed Fouly
- Mechanical Engineering Department, College of Engineering, King Saud University, 11421, Riyadh, Saudi Arabia
| | - Jabair A Mohammed
- Centre of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research, King Saud University, 11421, Riyadh, Saudi Arabia
| | - Sameh A Ragab
- Centre of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research, King Saud University, 11421, Riyadh, Saudi Arabia
| | - Hany S Abdo
- Centre of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research, King Saud University, 11421, Riyadh, Saudi Arabia.
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Crystal Structures of Al2Cu Revisited: Understanding Existing Phases and Exploring Other Potential Phases. METALS 2019. [DOI: 10.3390/met9101037] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
When processing single crystal X-ray diffraction datasets for twins of Al2Cu sample synthesized by the high-pressure sintering (HPS) method, we have clarified why the crystal structure of Al2Cu was incorrectly solved about a century ago. The structural relationships between all existing Al2Cu phases, including the Owen-, θ-, θ’-, and Ω-Al2Cu phases, were investigated and established based on a proposed pseudo Al2Cu phase. Two potential phases have been built up by adjusting the packing sequences of A/B layers of Al atoms that were inherent in all existing Al2Cu phases. The mechanical, thermal, and dynamical stability of two such novel phases and their electronic properties were investigated by first-principles calculations.
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Abstract
For aerospace structural applications of age-hardenable aluminum at temperatures above 100°C, a primary alloy-design criterion is creep resistance which depends on the strengthening effect and thermal stability of the second phases.. First principle calculations can be used to study fundamental properties of these phases and, therefore, help to identify the desired ones and their precipitate structures. In order to produce the desired phases, which are usually thermodynamically metastable, and to suppress the undesired phases, computational analysis (combining first principle calculations, cluster variation methods and CALPHAD) can assist in identifying beneficial trace additions and deleterious impurities that must be eliminated. This paper, using Al-Cu-Mg as an example, illustrates this approach, which if successful, should shorten the normal alloy development period.
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Boukos N, Flouda E, Papastaikoudis C. Transmission electron microscopy and X-ray diffraction study of T1and Ω precipitates in Al—Li alloys. ACTA ACUST UNITED AC 2000. [DOI: 10.1080/01418610008212099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Hasan F, Lorimer GW. An analytical electron microscopic investigation of precipitation in an Al-Cu-Zn-Mg-Ag alloy. Microsc Res Tech 1993; 24:359-66. [PMID: 8513176 DOI: 10.1002/jemt.1070240409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The distribution, morphology, chemistry, and crystallography of the precipitates formed during aging of an Al-Cu-Zn-Mg-Ag alloy have been studied using analytical transmission electron microscopy. The first precipitates to appear during aging at 150 degrees C were thin hexagonal-shaped plate-like precipitates which formed on the (111)Al planes. These precipitates had a face-centred orthorhombic crystal structure and their composition was essentially CuAl2 although they contained a trace of silver. At peak hardness the microstructure consisted of the plate-like precipitates on (111)Al planes and theta' precipitates on (100)Al planes. Overaging resulted in the precipitation of equilibrium theta, CuAl2, which exhibited a lath morphology and an orientation-relationship with the matrix (210)Al magnitude of (110)gamma; (001)Al misoriented from (001)gamma by approximately 6 degrees. Prolonged overaging at 250 degrees C resulted in the formation of cuboid-shaped Al5(Cu,Zn)6Mg2 precipitates which had a cubic crystal structure and a cube:cube orientation-relationship with the matrix.
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Affiliation(s)
- F Hasan
- Manchester Materials Science Centre, University of Manchester/UMIST, Great Britain
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Zheng ZQ, Liang SQ, Xu H, Tan CY, Yun DF. Effect of 0.5% silver on the age hardening behaviour of an Al-Li-Cu-Mg-Zr alloy. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf00420537] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Fonda R, Cassada W, Shiflet G. Accomodation of the misfit strain surrounding {III} precipitates (Ω) in AlCuMg(Ag). ACTA ACUST UNITED AC 1992. [DOI: 10.1016/0956-7151(92)90323-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Polmear IJ, Couper MJ. Design and development of an experimental wrought aluminum alloy for use at elevated temperatures. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf02628387] [Citation(s) in RCA: 130] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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