Comprehensive tensile properties improved by deep cryogenic treatment prior to aging in friction-stir-welded 2198 Al–Li alloy

Sun, Jian-Qiu; Ma, Yuanyuan; Gao, Chong; Luo, Hongyun

doi:10.1007/s12598-019-01214-5

Cited by 9 publications

(6 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The alloy hardness increased due to fracture and configurational changes in the FCC phase in the alloy after treatment. Its strengthening mechanism was similar to the fine-grain strengthening during deep cryogenic treatment often observed in traditional alloys [23,30,36]. After deep cryogenic treatment, the microstructure of the alloy produced fine crystal strengthening, which improved its deformation resistance and increased its hardness.…”

Section: Mechanical Propertiessupporting

confidence: 60%

“…Deep cryogenic treatment is a type of heat treatment that is widely used to study traditional alloys. Previous research [23] used cryogenic treatment before the aging of FSW 2198 aluminum alloy to obtain a relatively fine crystal structure and strength and toughness improvements. The strengthening mechanism of the deep cryogenic treatment of Al-Zn-Mg-Cu was shown to mainly be fine-grain strengthening [24].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe₂Ni₂ High-entropy alloy

Zhang

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

The influence of deep cryogenic treatment on the microstructure and properties of AlCrFe 2 Ni 2 highentropy alloy were studied by examining its phase composition, microstructure, and properties after cryogenic treatment. The results showed that as the cryogenic treatment increased, the alloy was composed of face-centered cubic (FCC) and body-centered cubic (BCC) phases. As the treatment time increased, the grain orientation of the BCC phase and B2 phase changed and transformed into each other, and the band FCC phase structures became shorter and more disordered. Deep cryogenic treatment effectively improved the hardness, yield strength, and wear resistance of the alloy. The alloy displayed the best performance with a holding time of 4 h, and the Vickers hardness (338 HV) was 11.6% higher than the as-cast alloy, and the yield strength (920 MPa) was 22.7% higher. The friction coefficient was 0.643, and the wear resistance was also significantly improved.

show abstract

Section: Mechanical Propertiessupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe₂Ni₂ High-entropy alloy

Zhang

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…For instance, Vinay Dwived et al [15] examined the impact of DCT on the micro-hardness of FSW Al 7050-T7451 and observed that cryogenically treated joints exhibited higher microhardness compared to those without cryogenic treatment. Similarly, Wang et al [16] studied the effect of DCT on the FSW joints of 2024-T351 aluminum alloy and discovered that pre-DCT facilitated the redissolution or dispersion of unstable phases in the as-welded joints.…”

Section: Introductionmentioning

confidence: 99%

Effect on microstructure and mechanical properties of friction stir welded 5A06 aluminum alloy joints by deep cryogenic treatment

Du,

Qiao,

Wang

et al. 2024

Mater. Res. Express

View full text Add to dashboard Cite

In order to improve the comprehensive mechanical properties of the welded joints of the 5A06 aluminum alloy, friction stir welded (FSW) joints were subjected to deep cryogenic treatment (DCT). The microstructure and mechanical properties were characterised using metallographic microscopy, X-ray diffractometer (XRD), energy spectrometer, microhardness tests, and tensile tests. The experimental results show that DCT refines the structure significantly due to the large temperature difference. This refinement results from an increase in Mg atoms within the α-Al solid solution through the precipitation of Al atoms, forming the Al3Mg2 phase. This enhancement in plasticity is achieved through dispersion distribution. Moreover, as the treatment time of DCT increases, the mechanical properties of the welded joint also improve significantly. With an extended treatment time of DCT, the microhardness of the welded joints reaches its peak, leading to an average microhardness increase of up to 6.9% compared to welded joints without DCT. Additionally, the tensile properties of the welded joints reach 385.3MPa, marking a 7.4% increase in tensile strength compared to joints without DCT. These experimental results underscore the significant impact of DCT on improving the welded joints.

show abstract

“…As is common knowledge, Al–Cu–Li alloys have superior properties due to the addition of Li, which influences weight reduction, Young's modulus, and mechanical properties. [ 1–4 ] One of the representatives of the third generation of Al–Cu–Li alloys, 2198 alloys, possesses exceptional corrosion resistance [ 5 ] and damage tolerance, including fracture toughness and fatigue properties. [ 6–8 ] Generally, the recrystallization fraction is closely related to the above capacities.…”

Section: Introductionmentioning

confidence: 99%

Precipitation of Al₃Zr Dispersoids under Various Homogenization and Its Effect on Recrystallization in 2198 Al–Cu–Li Alloy

Xun,

Li,

Wen

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

In this research, the precipitation of Al3Zr during one‐ and two‐step homogenization processes is studied by the transmission electron microscopy (TEM) method, and its effect on recrystallization is investigated by the electron backscattering diffraction (EBSD) technique after the same hot compression and solution treatment, respectively. The results show that when the temperature reaches 430°C, just some small Al3Zr dispersoids are visible in samples that undergone one‐step treatment. As the first‐step homogenization temperature increased from 365°C to 430°C, the size of the Al3Zr particle increases from 9.4 nm to 19.1 nm while the number density decreases rapidly from 1201 μm‐3 to 183 μm‐3. In addition, the average radius of Al3Zr increases to 22.1 nm while the number density decreased to 76 μm‐3 when the sample is homogenized at 500°C/24h. After a double‐step homogenization with decreased first‐step temperature, lower recrystallization fraction is obtained. Therefore, the optimal homogenization treatment is determined to be 365°C/16h + 500°C/24h, after which the most desirable Al3Zr distribution and the smallest recrystallization fraction are obtained during thermomechanical processing. This result can provide a more appropriate parameter for homogenization treatment in order to achieve a more dispersed distribution, which will result in stronger pinning force during the thermomechanical process.This article is protected by copyright. All rights reserved.

show abstract

Comprehensive tensile properties improved by deep cryogenic treatment prior to aging in friction-stir-welded 2198 Al–Li alloy

Cited by 9 publications

References 37 publications

Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe₂Ni₂ High-entropy alloy

Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe₂Ni₂ High-entropy alloy

Effect on microstructure and mechanical properties of friction stir welded 5A06 aluminum alloy joints by deep cryogenic treatment

Precipitation of Al₃Zr Dispersoids under Various Homogenization and Its Effect on Recrystallization in 2198 Al–Cu–Li Alloy

Contact Info

Product

Resources

About

Comprehensive tensile properties improved by deep cryogenic treatment prior to aging in friction-stir-welded 2198 Al–Li alloy

Cited by 9 publications

References 37 publications

Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe2Ni2 High-entropy alloy

Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe2Ni2 High-entropy alloy

Effect on microstructure and mechanical properties of friction stir welded 5A06 aluminum alloy joints by deep cryogenic treatment

Precipitation of Al3Zr Dispersoids under Various Homogenization and Its Effect on Recrystallization in 2198 Al–Cu–Li Alloy

Contact Info

Product

Resources

About

Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe₂Ni₂ High-entropy alloy

Effect of deep cryogenic treatment on the microstructure and mechanical properties of AlCrFe₂Ni₂ High-entropy alloy

Precipitation of Al₃Zr Dispersoids under Various Homogenization and Its Effect on Recrystallization in 2198 Al–Cu–Li Alloy