Microstructure and mechanical properties of two-stage aged Al–Cu–Mg–Ag–Sm alloy

Two-stage aging treatments were applied to Al-6Si-2Cu-0.5Mg casting alloy, and the influence of aging treatment parameters on the microstructure and mechanical properties was investigated. The experimental results indicated that the microstructure and mechanical properties of Al-6Si-2Cu-0.5Mg alloy were significantly influenced by the aging time and temperature, and the elongation remarkably increased with the aging time increasing before 7 h. In the case of the alloy aged at 200°Cfor 2h, higher hardness and tensile strength were obtained, which may be attributed to precipitation of a large amount of Cu-rich phases. However, the higher elongation was achieved in the alloy under 200°C aging treatment for 5h, while its hardness and tensile strength slightly decreased. It is mainly due to the amount of the Cu-rich phases decrease slightly, but the morphology of the phases evolved from plate-like to bulk-like structure.

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Effects of Second Extrusion Deformation on Microstructure and Mechanical Properties of ZM21 Magnesium Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.926-930.89 ◽

2014 ◽

Vol 926-930 ◽

pp. 89-92

Author(s):

Quan Li ◽

Wen Jun Liu ◽

Ren Ju Cheng ◽

Shan Jiang ◽

Su Qin Luo ◽

...

Keyword(s):

Mechanical Properties ◽

Mechanical Property ◽

Magnesium Alloy ◽

Structure Evolution ◽

Two Stage ◽

Microstructure And Mechanical Properties ◽

Zm21 Magnesium Alloy ◽

Parameter Condition

The two-stage deformation was processed to ZM21alloy as cast at different parameter condition, and structure evolution and mechanical property was analyzed. The results indicate that the grain of ZM21 alloy as cast will be fined by the two-stage extrusion deformation, and its size can decreases from about 100μm to 15.6μm. The strength of ZM21 alloy can be raised by the two-stage deformation, up to 261.7MPa, At the same time, the prolongation rate is more than 16% by the two-stage deformation.

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Effect of Graphene-Oxide Addition on the Microstructure and Mechanical Properties of Two-Stage Sintered Zirconia-Toughened Alumina (ZTA) Composites

MATEC Web of Conferences ◽

10.1051/matecconf/202133503019 ◽

2021 ◽

Vol 335 ◽

pp. 03019

Author(s):

Hsien Loong Teow ◽

Sivakumar Sivanesan ◽

Se Yong Eh Noum ◽

Ananthan Soosai ◽

Suresh Muniandy

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Graphene Oxide ◽

Young’S Modulus ◽

Young's Modulus ◽

High Hardness ◽

Two Stage ◽

Total Hip ◽

Microstructure And Mechanical Properties ◽

Zirconia Toughened Alumina

United Nations has estimated that 130 million people would suffer from osteoarthritis worldwide by 2050. This disease would require patients to undergo a surgery known as Total Hip Replacement (THR) which has a failure rate of approximately 1 % with a lifespan of 20 years. The biomaterials used to manufacture this total hip artroplasty are mainly made of Zirconia-Toughened Alumina. In this work, Zirconia Toughened Alumina (ZTA) composites with 10 vol% Y-TZP content were doped with small amount (0.01 to 1 wt%) of graphene oxide (GO). The GO-doped ZTA composites were produced via two-stage sintering with T1 ranging between 1400°C and 1550°C, heating rate of 20°C/min, followed by T2 of 1350°C and 12 hours holding time. The sintered ZTA samples were then evaluated on its microstructure and mechanical properties such as bulk density, Vickers hardness, Young’s modulus and fracture toughness to investigate the effect of GO addition on ZTA samples prepared via two-stage sintering. The results showed that ZTA composites containing up 0.1 wt% GO is beneficial in improving the microstructural and mechanical properties of ZTA composites prepared via two-stage sintering. The sample recorded a high hardness of up to 18.5 GPa, Young’s modulus of 406 GPa and fracture toughness of 5.8 MPam1/2 when sintered at T1 of 1450℃.

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Study of Solid Solution Treatment on Spray Deposited 7A04 Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.217-219.1853 ◽

2012 ◽

Vol 217-219 ◽

pp. 1853-1856

Author(s):

Rui Ming Su ◽

Ying Dong Qu ◽

Run Xia Li ◽

Rong De Li

Keyword(s):

Mechanical Properties ◽

Solid Solution ◽

Solution Treatment ◽

Aging Treatment ◽

Hot Extrusion ◽

X Ray Diffraction ◽

Two Stage ◽

Solid Solution Treatment ◽

Microstructure And Mechanical Properties ◽

Better Than

The Al-Zn-Mg-Cu (7A04) alloys were prepared by using the method of spraying deposition and the hot extrusion. The effects of two-stage solid solution treatment and single solid solution treatment on the microstructure and mechanical properties of spray deposited 7A04 alloy were investigated. The microstructure and mechanical properties were observed and tested by optical microscopy, SEM, X-ray diffraction and other methods. It is indicated that the two-stage solid solution treatment is better than the single. After the two-stage solid solution, the sizes of recrystallization grains were small and a lot of precipitations were dissolved. And the microstructure was nice by ageing treatment. The tensile strength and elongation of the alloy can respectively reach 740MPa and 5.8 percent by the two-stage solid solution (at 450°C for 1 hour and 475°C for 2 hours) and the aging treatment.

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