Results 151 to 160 of about 958 (181)
Some of the next articles are maybe not open access.
Corrosion performance of magnesium alloys MEZ and AZ91
International Journal of Cast Metals Research, 2000The corrosion performance of sand cast MEZ(S), zirconium-grain-refined MEZ(R), sand cast AZ91(S), and high pressure diecast AZ91(D) magnesium alloys were evaluated by means of salt spray testing, optical metallography, hydrogen evolution, polarisation curve measurement and AC impedance spectroscopy. The results show that the corrosion resistance of the
Song, Guangling, StJohn, David
openaire +4 more sources
Interdependence of Hydrogen and Microporosity in Magnesium Alloy AZ91
SAE Technical Paper Series, 1993<div class="htmlview paragraph">The relationship between hydrogen gas and microporosity in magnesium alloy AZ91 was quantified, refuting the belief that hydrogen levels less than the maximum solid solubility are of no detriment. Sand castings were made from melts containing measured levels of hydrogen gas, and the amount of porosity was ...
Barry A. Mikucki, James D. Shearouse
openaire +1 more source
Dry sliding wear behavior of globular AZ91 magnesium alloy and AZ91/SiCp composites
Wear, 2017Abstract Dry sliding wear behavior of rheocast AZ91 magnesium alloy and AZ91/SiCp composites reinforced with 5 and 10 vol% SiC particles were investigated under normal loads of 10–250 N and sliding speeds of 0.1, 0.3, 0.5 and 1 m/s using pin-on-disc configuration against a 1045 steel disc counterbody. In this work, rheocast alloys and composites have
S. García-Rodríguez +5 more
openaire +1 more source
Materials & Design, 2011
Abstract The effects of 2 wt.% rare earth element addition on the microstructure evolution, thermal stability and shear strength of AZ91 alloy were investigated in the as-cast and annealed conditions. The as-cast structure of AZ91 consists of α-Mg matrix and the β-Mg17Al12 intermetallic phase.
R. Mahmudi, F. Kabirian, Z. Nematollahi
openaire +1 more source
Abstract The effects of 2 wt.% rare earth element addition on the microstructure evolution, thermal stability and shear strength of AZ91 alloy were investigated in the as-cast and annealed conditions. The as-cast structure of AZ91 consists of α-Mg matrix and the β-Mg17Al12 intermetallic phase.
R. Mahmudi, F. Kabirian, Z. Nematollahi
openaire +1 more source
Crystallography of directionally solidified magnesium alloy AZ91
Metallurgical Transactions A, 1989The crystallographic direction of growth in directionally solidified magnesium alloy AZ91 has been studied by TEM and EBSP techniques in SEM. The main direction of growth is found to be $$\left\langle {11\bar 20} \right\rangle $$ .
Ketil Pettersen, Nils Ryum
openaire +1 more source
Two-Step Anodization of AZ91 Magnesium Alloy
Materials Science Forum, 2005Among four AZ91 samples, two were once anodized and the others were twice anodized in two electrolytic baths. After twice anodization, two coatings coexist on the base metal. Surface morphology showed that for one of twice anodic coatings (sample 2), the second coating only existed on some places and sealed some pores of the first coating after short ...
Rong Fa Zhang, Da Yong Shan, En-Hou Han
openaire +1 more source
Corrosion of Mg alloy AZ91 – the role of microstructure
Corrosion Engineering, Science and Technology, 2004AbstractThe paper presents new findings concerning the role of microstructural variations in the localised corrosion of a magnesium alloy AZ91. The alloy with prior solution treatment (T4 condition), when subjected to aging treatments (T6 condition), developed intermetallic β phase (Mg17 Al12), which is cathodic to the alloy matrix, i.e.
R.K. Singh Raman +2 more
openaire +1 more source
Study on the fluidity of AZ91+xRE magnesium alloy
Materials Science and Engineering: A, 1999Influence of section thickness, pouring temperature, mould temperature and content of rare earth (RE) element on the fluidity of AZ91 magnesium alloy has been studied through fluidity specimens with different section thickness cast in metal mould. The results show that the relation curve of filling length versus section thickness can be divided into ...
Wang Qudong +6 more
openaire +1 more source
Wettability of Mg and AZ91 Alloy on Ti6Al4V Alloy Substrate
The wettability of liquid Mg and AZ91 alloy on bulk Ti6Al4V alloy was investigated in the current study. Wetting experiments were conducted by gradually heating the samples to 800°C for 30 minutes. A CCD camera was used to capture the morphological changes in the droplet during contact angle measurements.Bütev Öcal, Ezgi +1 more
openaire +1 more source
Surface treatment of cast AZ91 alloy
2009Cast AZ91 is the most typical magnesium alloy due to its superior combination of castability, mechanical strength and ductility. However, it also suffers from poor wear and corrosion resistance, which limits its wider industrial applications. Surface treatment has been recognised as a major emerging technology that can solve this problem without ...
Zhang, Ming-Xing +5 more
openaire +1 more source