Mechanical Properties of Twin Roll Cast AZ91 Magnesium Alloy at Room Temperature

2007 ◽  
Vol 26-28 ◽  
pp. 145-148 ◽  
Author(s):  
Shu Hei Uchida ◽  
Ippei Takeuchi ◽  
Gentaro Gonda ◽  
Kinji Hirai ◽  
Tokuteru Uesugi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Room Temperature ◽  
Cast Alloy ◽  
Casting Process ◽  
Az91 Magnesium Alloy ◽  
Die Cast ◽  
Az91 Magnesium ◽  
Twin Roll Cast ◽  
Twin Roll

Twin roll casting process combines casting and hot rolling into a single process. In this study, mechanical properties at room temperature and microstructure of the twin roll cast AZ91 magnesium alloy are investigated. The alloy exhibited a good combination of high ultimate strength of 343MPa, yield stress of 224MPa and elongation to failure of 13%. The mechanical property was very excellent compared with AZ91 die-cast alloy. EPMA analysis reveals that the Al concentration in Mg matrix is higher in twin roll cast alloy than that in die-cast alloy. This high Al concentration must be the origin of the good mechanical properties of twin roll cast alloy at room temperature.

Mechanical Properties of Twin Roll Cast AZ91 Magnesium Alloy at Room Temperature

2007 ◽  
pp. 145-148 ◽  
Author(s):  
Shu Hei Uchida ◽  
Ippei Takeuchi ◽  
Gentaro Gonda ◽  
Kinji Hirai ◽  
Tokuteru Uesugi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Room Temperature ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium ◽  
Twin Roll Cast ◽  
Twin Roll

Fluxless Recycling of Die-Cast AZ91 Magnesium Alloy Scrap

2005 ◽  
Vol 475-479 ◽  
pp. 541-544 ◽  
Author(s):  
Hwa Chul Jung ◽  
Young Cheol Lee ◽  
Kwang Seon Shin
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Die Casting ◽  
Casting Process ◽  
Az91 Alloy ◽  
Main Concern ◽  
Az91 Magnesium Alloy ◽  
Die Cast ◽  
Class 1 ◽  
High Level

Magnesium die-casting has experienced dramatic growth over the past decade and the recycling of magnesium scrap has become increasingly important due to the generation of substantial quantities of scrap in the die-casting process. Magnesium is a readily recyclable material and the recycling of magnesium scrap is crucial in making magnesium more competitive. The main concern associated with using the secondary magnesium is the high level of Fe content and oxide inclusions that are detrimental to the corrosion and mechanical properties of the secondary alloy. In this study, the die-cast specimens were produced using the recycled class 1 scrap which is refined by means of Ar bubbling and Mn addition without using refining fluxes, and their mechanical properties and corrosion characteristics were investigated. The results showed that the tensile properties of the secondary AZ91 alloy were equivalent to those of the primary magnesium alloy after appropriate treatments. The corrosion resistance of the recycled magnesium was also found to increase by Ar bubbling and Mn addition.

Effect of Ca and Sr Content on Elevated Temperatures Mechanical Properties of a Cast AZ91 Magnesium Alloy

2007 ◽  
Vol 26-28 ◽  
pp. 141-144
Author(s):  
Ippei Takeuchi ◽  
Kinji Hirai ◽  
Yorinobu Takigawa ◽  
Tokuteru Uesugi ◽  
Kenji Higashi
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Creep Resistance ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Tensile Tests ◽  
Az91 Magnesium Alloy ◽  
Additional Amount ◽  
Az91 Magnesium ◽  
Second Phases

The effect of Ca and Sr content on the microstructure and mechanical properties of a cast AZ91 magnesium alloy is investigated. Ca and Sr additions in AZ91 magnesium alloy are expected high creep resistance. The microstructure of the alloy exhibits the dendritic α-matrix and the second-phases forming networks on the grain boundary. Tensile tests at elevated temperatures between 448 and 523K reveal that the creep resistance was improved with increasing the additional amount of Ca, especially more than 1.0wt%. From the perspective of grain refinement effect, it is expected that the additions of Ca and Sr to AZ91 magnesium alloy not only improve creep resistance but also improve mechanical properties at room temperature.

scholarly journals Magnesium Alloy Strip Produced by a Melt-Conditioned Twin Roll Casting Process

2011 ◽  
Vol 690 ◽  
pp. 129-132 ◽  
Author(s):  
Iman Bayandorian ◽  
Yan Huang ◽  
Geoff M. Scamans ◽  
Zhong Yun Fan
Keyword(s):  
Magnesium Alloy ◽  
Tensile Elongation ◽  
Casting Process ◽  
Downstream Processing ◽  
Alloy Strip ◽  
Az91 Magnesium Alloy ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Az91 Magnesium ◽  
Twin Roll

Melt conditioning by intensive shear was used prior to twin roll casting of an AZ91 magnesium alloy strip to promote heterogeneous nucleation and produce a refined and uniform microstructure without severe macro-segregation. The as-cast strip was then processed by homogenization, hot rolling and annealing and the microstructural behaviour during the downstream processing was examined and compared with the strip of the same alloy produced without melt conditioning. The melt conditioned strip after downstream processing displayed significantly improved mechanical properties with an average tensile elongation of ~16%, compared with ~10% for the strip produced without melt conditioning and the reported values of ~1.5-6.2% in the literature.

Mechanical Properties of Extruded and ECAP Processed Magnesium Alloy AZ91 at Elevated Temperature

2017 ◽  
Vol 891 ◽  
pp. 366-371 ◽  
Author(s):  
Roman Štěpánek ◽  
Libor Pantělejev ◽  
Ehsan Mostaed ◽  
Maurizio Vedani
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Magnesium Alloy ◽  
Room Temperature ◽  
Tensile Tests ◽  
Az91 Magnesium Alloy ◽  
Magnesium Alloy Az91 ◽  
Az91 Magnesium ◽  
Reduction Of Area ◽  
Increasing Temperature

In this paper tensile properties at elevated temperature of extruded AZ91 magnesium alloy and the same alloy further processed by ECAP (exECAP) are compared. The tensile tests were performed at room temperature and for the temperature range of 100 to 300 °C. Loading speed 2 mm/min was used for the tests. At room temperature mechanical properties except elongation were slightly higher for extruded material yet still very similar to properties of exECAPed material. Overall trend of properties evolution with increasing temperature was also similar but the decrease of strength or the increase of elongation and reduction of area respectively is more intensive for exECAPed material. Elongation of exECAPed material exceeded elongation of extruded material more than twice at 300 °C and with value of ~260% this alloy exhibited pseudosuperplastic behavior.

Enhanced mechanical properties of AZ91 magnesium alloy by inoculation and hot deformation

2021 ◽  
Vol 802 ◽  
pp. 140667
Author(s):  
Mohammad Sajad Mehranpour ◽  
Ali Heydarinia ◽  
Massoud Emamy ◽  
Hamed Mirzadeh ◽  
Ali Koushki ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Hot Deformation ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium

Quantitative Characterization of Pore Arrangement in Pore Bands in Pressure Die Cast AZ91 Magnesium Alloy by Image Processing

2006 ◽  
Vol 514-516 ◽  
pp. 1477-1482 ◽  
Author(s):  
D. G. Leo Prakash ◽  
Doris Regener
Keyword(s):  
Image Processing ◽  
Magnesium Alloy ◽  
Programming Language ◽  
Az91 Magnesium Alloy ◽  
Quantitative Characterization ◽  
Processing Defect ◽  
Die Cast ◽  
Az91 Magnesium ◽  
Pore Arrangement

Microporosity is the major processing defect in pressure die cast AZ91 magnesium alloy. There is a big difference in the arrangement of pores in different regions of the castings. The present work explains the pore arrangement in pore bands and other regions. Quantification and characterization of pores in pore bands is expected to be useful to understand the process-propertymicrostructure correlation. A computational microstructural (image) analyzing technique has been developed by a programming language to quantify and analyze the micropores in pore bands. The pore band regions and the rest were separated and quantified. In addition, image analyzing technique was used to measure the clustering tendency of porosity in pore bands and it was compared with other regions.

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