Mechanical Properties and Corrosion Behavior of Multi-Microalloying Mg Alloys Prepared by Adding AlCoCrFeNi Alloy

2022 ◽  
Author(s):  
Xiong Zhou ◽  
Qichi Le ◽  
Chenglu Hu ◽  
Ruizhen Guo ◽  
Tong Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Behavior ◽  
Mg Alloys ◽  
Mechanical Properties And Corrosion

Mechanical properties and corrosion behavior of galvanized steel/Al dissimilar joints

2021 ◽  
Vol 21 (4) ◽  
Author(s):  
Hao Jiang ◽  
Yuxuan Liao ◽  
Lijun Jing ◽  
Song Gao ◽  
Guangyao Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Behavior ◽  
Galvanized Steel ◽  
Dissimilar Joints ◽  
Mechanical Properties And Corrosion

scholarly journals Effect of deformation and annealing temperature on the mechanical properties and microstructure of Al-4.5Zn-1.5Mg-0.9Cr (wt. %) alloy fabricated by squeeze casting

2018 ◽  
Vol 153 ◽  
pp. 01001
Author(s):  
Maya Putri Agustianingrum ◽  
Nuzulian Akbar Arandana ◽  
Risly Wijanarko ◽  
Bondan Tiara Sofyan
Keyword(s):  
Mechanical Properties ◽  
Squeeze Casting ◽  
Deformation Behaviour ◽  
Optical Microscope ◽  
Dislocation Motion ◽  
Hot Tearing ◽  
Mg Alloys ◽  
Recrystallization Temperature ◽  
Forming Process ◽  
Mechanical Properties And Corrosion

In order to produce structural products, Al-Zn-Mg alloys undergo various forming processes. Problems that are usually found in the forming process include peripheral coarse grain (PCG) and hot tearing which decrease mechanical properties and corrosion resistance of the alloys. Addition of microalloying element such as chromium (Cr) is an alternative to overcome these problems. The presence of Cr in Al-Zn-Mg alloys supresses the grain growth by preventing excess recrystallization. In this research 0.9 wt. % Cr was added to Al-4.5Zn-1.5Mg alloy and the deformation behaviour as well as subsequent recrystallization was observed. The alloy was fabricated by squeeze casting followed by homogenization at 400 °C for 4 h. The samples were cold rolled for 5, 10, and 20 %. The 20 % deformed samples were then annealed at 300, 400, and 500 °C for 2 h. Material characterization consisted of microstructure analysis using optical microscope and Scanning Electron Microscope (SEM) – Energy Dispersive Spectroscopy (EDS), hardness testing using Micro Vicker methods. The results showed that the deformed grain ratio was 1.6, 2.84, and 2.99 in the 5, 10, and 20 % deformed samples, respectively. The elongated dendrites were effective to increase the hardness of the alloy. Recrystallization was not detected during annealing at 300 and 400 °C, but was observed at 500 °C. Whereas, for the samples without Cr addition, recrystallization occurred at 400 °C. It means that the addition of Cr increased the recrystallization temperature of the alloy. It occured because (Al, Zn)7Cr dispersoids with size less than 1 μm impeded the dislocation motion during annealing, so that recrystallization was retarded. On the other hand (Al, Zn)7Cr dispersoids with size more than 1 μm promoted the formation of new grains around them by Particle Stimulated Nucleation (PSN) mechanism. In this case, the fine (Al, Zn)7Cr dominated so that recrystallization was slower.

scholarly journals Designing Advanced Biomedical Biodegradable Mg Alloys: A Review

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 85
Author(s):  
Murtatha M. Jamel ◽  
Mostafa M. Jamel ◽  
Hugo F. Lopez
Keyword(s):  
Mechanical Properties ◽  
Biomedical Applications ◽  
Hydrogen Generation ◽  
Mg Alloys ◽  
Living Tissue ◽  
Effective Factors ◽  
Alloying Additions ◽  
Mechanical Integrity ◽  
Corrosion Rates ◽  
Mechanical Properties And Corrosion

The increased demand for alloys that can serve as implantation devices with outstanding bio-properties has led to the development of numerous biomedical Mg-based alloys. These alloys have been extensively investigated for their performance in living tissue with mixed results. Hence, there are still major concerns regarding the use of magnesium alloys for such applications. Among the issues raised are elevated corrosion rates, hydrogen generation, and the maintenance of mechanical integrity for designated healing times. In addition, toxicity can arise from the addition of alloying elements that are intended to improve the mechanical integrity and corrosion resistance of Mg alloys. The current work reviews the recent advances in the development of Mg alloys for applications as bio-absorbable materials in living organic environments. In particular, it attempts to develop a roadmap of effective factors that can be utilized when designing Mg alloys. Among the factors reviewed are the effects of alloying additions and processing methods on the exhibited mechanical properties and corrosion rates in simulated bio-fluids used in biomedical applications.

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