scholarly journals Decreasing Bio-Degradation Rate of the Hydrothermal-Synthesizing Coated Mg Alloy via Pre-Solid-Solution Treatment

Materials ◽  
2017 ◽  
Vol 10 (8) ◽  
pp. 858 ◽  
Author(s):  
Dan Song ◽  
Cheng Li ◽  
Liwen Zhang ◽  
Xiaolong Ma ◽  
Guanghui Guo ◽  
...  
Keyword(s):  
Solid Solution ◽  
Degradation Rate ◽  
Solution Treatment ◽  
Mg Alloy ◽  
Solid Solution Treatment

Effect of Boron Addition on Microstructure and Mechanical Properties of AZ84 Mg Alloy

2016 ◽  
Vol 879 ◽  
pp. 653-658
Author(s):  
Ju Hyun Won ◽  
Seok Hong Min ◽  
Tae Kwon Ha
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Solution Treatment ◽  
Treatment Temperature ◽  
Mg Alloy ◽  
Solution Treatment Temperature ◽  
Solid Solution Treatment ◽  
Microstructure And Mechanical Properties ◽  
Peak Aging ◽  
Aging Kinetics

Effect of B addition on the microstructure and mechanical properties of AZ84 Mg alloy was investigated in this study. Through calculation of phase equilibria of AZ84 Mg alloy, carried out by using FactSage® and FTLite database, solution treatment temperature was decided as temperature of 330oC, where supersaturated solid solution can be obtained. Solid solution treatment of AZ84 Mg alloy was successfully conducted at 330oC and supersaturated microstructure with all almost all phases resolved into matrix was obtained. After solution treatment, hot rolling was successfully conducted by reduction of 60%. Compression and tension tests were carried out at room temperature on the samples in as-cast, solution treated, hot-rolled and subsequently recrystallized states. After solid solution treatment, each alloy was soaked at temperatures of 180 and 200oC for time intervals from 1 min to 48 hrs and hardness of each condition was measured by micro-Vickers method. Peak aging conditions were deduced as at the temperature of 200 oC for 10 hrs for ZA84 Mg alloy. By addition of boron, aging kinetics was expedited and strength was enhanced.

Effect of the Solid-Solution Treatment on the Die-Casting Structures and Properties of Commercial RE-AZ91 Mg Alloy

2012 ◽  
Vol 476-478 ◽  
pp. 109-113
Author(s):  
Yao Li ◽  
Jun Jie Yang ◽  
Wu Xin Yu ◽  
Ping Xue ◽  
Zhi Jiang Zuo ◽  
...  
Keyword(s):  
Solid Solution ◽  
Tensile Strength ◽  
Grain Boundaries ◽  
Rare Earths ◽  
Die Casting ◽  
Solution Treatment ◽  
Mg Alloy ◽  
Elongation Ratio ◽  
Solid Solution Treatment ◽  
Structures And Properties

Effect of the solid-solution treatment on the casting structures and properties of the die-casting Mg alloy was explored through the way of adding mixed rare earths Y, Gd and Nd into the commercial Re-AZ91 Mg alloy . The results show that the solid-solution treatment could improve effectively the microstructures of the alloy, and Mg17Al12 phrase on the grain boundaries could transform from network struture into dotlike or granular one. At the same time, the compounds on the grain boundaries were less than those before the solid-solution treatment, the compounds were dispersed inside the grain . Both the microstructures and the mechanics properties of the alloy could be improved remarkably, and also, the tensile strength σb could reach over 280MPa, the elongation ratio δ over 9% when the temperature of the solid-solution treatment was between 270°C and 410°C. When the temperature of the solid-solution treatment exceeded 420°C, coarse Al-RE compounds would be formed inside the alloy, which could reduce the mechanics properties of AZ91 Mg Alloy.

Effect of electropulsing treatment on solid solution behavior of an aged Mg alloy AZ61 strip

2008 ◽  
Vol 23 (10) ◽  
pp. 2685-2691 ◽  
Author(s):  
Yanbin Jiang ◽  
Guoyi Tang ◽  
Lei Guan ◽  
Shaonan Wang ◽  
Zhuohui Xu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Solution Process ◽  
Solution Treatment ◽  
Mg Alloy ◽  
X Ray Diffraction ◽  
Solution Behavior ◽  
Β Phase ◽  
Solid Solution Treatment ◽  
Conventional Heat Treatment ◽  
Electropulsing Treatment

The effect of electropulsing treatment (EPT) on the solution behavior of aged Mg alloy AZ61 strip was investigated using scanning electron microscope (SEM) and x-ray diffraction (XRD). It was found that EPT accelerated tremendously the dissolution of β phase into α matrix in an aged Mg alloy AZ61 strip. The dissolution of β phase took place in less than 4 s at relatively low temperature under EPT, compared with that in conventional heat treatment. A mechanism for rapid solid solution process during EPT was proposed based on the coupling of the thermal and athermal effects. The results in this investigation indicated that EPT played an important role in the nonequilibrium microstructural evolution in the alloy. It is supposed that EPT can provide a highly efficient approach for solid solution treatment of the alloy.

scholarly journals Corrosion Behavior of the As-Cast and As-Solid Solution Mg-Al-Ge Alloy

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1812 ◽  
Author(s):  
Xiaoda Liu ◽  
Ming Yin ◽  
Shaohua Zhang ◽  
Huan Wei ◽  
Baosheng Liu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Solution Treatment ◽  
Electrochemical Measurement ◽  
Phase Changes ◽  
Solid Solution Alloy ◽  
Corrosion Performance ◽  
Corrosion Morphology ◽  
Solid Solution Treatment

The corrosion behavior of Mg-3Al-xGe (x = 1, 3, 5) alloy in as-cast and as-solid was investigated by virtue of microstructure, corrosion morphology observation, and electrochemical measurement. Among the as-cast alloys, the corrosion rate of Mg-3Al-1Ge with a discontinuous bar-morphology was the highest, which was 101.7 mm·a−1; the corrosion rate of Mg-3Al-3Ge with a continuous network distribution was the lowest, which was 23.1 mm·a−1; and the corrosion rate of Mg-3Al-5Ge of Ge-enriched phase with sporadic distribution was in-between, which was 63.9 mm·a−1. It is suggested that the morphology of the Mg2Ge phase changes with a change in Ge content, which affects the corrosion performance of the alloy. After solid solution treatment, the corrosion rate of the corresponding solid solution alloy increased—Mg-3Al-1Ge to 140.5 mm·a−1, Mg-3Al-3Ge to 52.9 mm·a−1, and Mg-3Al-5Ge to 87.3 mm·a−1, respectively. After investigation of the microstructure, it can be suggested that solid solution treatment dissolves the Mg17Al12 phase, which changes the phase composition of the alloy and also affects its microstructure, thus affecting its corrosion performance.

Influences of the γ′ Phase on the Mechanical Properties of a Nickel-Based Single Crystal Superalloy

2021 ◽  
Vol 1023 ◽  
pp. 45-52
Author(s):  
Xiao Yan Wang ◽  
Meng Li ◽  
Zhi Xun Wen
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Single Crystal ◽  
Tensile Properties ◽  
Room Temperature ◽  
Solution Treatment ◽  
Single Crystal Superalloy ◽  
Original Material ◽  
Solid Solution Treatment ◽  
The Matrix

After solid solution treatment at 1335°C for 4 hours and cooling to room temperature at different rate, the nickel-based single crystal superalloy were made into three kinds of nickel-based single crystal superalloy materials containing different size γ′ phases, respectively. The tensile test of I-shaped specimens was carried out at 980°C, and their effect of γ′ phase microstructure on the tensile properties was studied. The results show that the yielding strength of the material air-cooled to room temperature was lower than that with cooling rate at 0.15°C/s, but both of them were lower than the yielding strength of original material. Little difference was found on the elastic modulus of I-shaped specimens made of three kinds of materials. When the cubic degree of the γ′ phase is higher and the size is larger, the tensile properties of the material is better, which can be attributed to the larger size and narrower channel of the matrix phase that lead to higher dislocation resistance.

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