Microstructure and Mechanical Properties of the Age-Hardening Eutectic Aluminium-Silicon Alloy G-AlSi12(CuMgNi) / Gefüge und mechanische Eigenschaften der aushärtenden eutektischen Aluminium-Silicium-Legierung G-AISil2(CuMgNi)

1990 ◽  
Vol 81 (11) ◽  
pp. 816-825
Author(s):  
Paul Jürgen ◽  
Hans Eckart Exner
Keyword(s):  
Mechanical Properties ◽  
Age Hardening ◽  
Mechanische Eigenschaften ◽  
Silicon Alloy ◽  
Microstructure And Mechanical Properties

scholarly journals Effects of Gd, Y Content on the Microstructure and Mechanical Properties of Mg-Gd-Y-Nd-Zr Alloy

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 790 ◽  
Author(s):  
Changping Tang ◽  
Kai Wu ◽  
Wenhui Liu ◽  
Di Feng ◽  
Xuezhao Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Solution Treatment ◽  
Age Hardening ◽  
Uniaxial Tensile ◽  
Microstructure And Mechanical Properties ◽  
Shaped Particle ◽  
Zr Alloy ◽  
Non Equilibrium

The effects of Gd, Y content on the microstructure and mechanical properties of Mg-Gd-Y-Nd-Zr alloy were investigated using hardness measurements, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and uniaxial tensile testing. The results indicate that the alloys in as-cast condition mainly consist of α-Mg matrix and non-equilibrium eutectic Mg5.05RE (RE = Gd, Y, Nd). After solution treatment, the non-equilibrium eutectics dissolved into the matrix but some block shaped RE-rich particles were left at the grain boundaries and within grains. These particles are especially Y-rich and deteriorate the mechanical properties of the alloys. Both the compositions of the eutectic and the block shaped particle were independent of the total Gd, Y content of the alloys, but the number of the particles increases as the total Gd, Y content increases. The ultimate tensile strength increases as the total Gd, Y content decreases. A Mg-5.56Gd-3.38Y-1.11Nd-0.48Zr alloy with the highest ultimate tensile strength of 280 MPa and an elongation of 1.3% was fabricated. The high strength is attributed to the age hardening behavior and the decrease in block shaped particles.

Effect of Heat Treatment on Microstructure and Tensile Properties of A356/V2O5 Insitu Composites

2016 ◽  
Vol 6 (3) ◽  
pp. 1-10 ◽  
Author(s):  
Amneesh Singla ◽  
Rajnish Garg ◽  
Mukesh Saxena
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Base Alloy ◽  
Stir Casting ◽  
Optical Microscope ◽  
Age Hardening ◽  
Weight Percentage ◽  
Casting Technique ◽  
Microstructure And Mechanical Properties ◽  
Oxide Particles

A 356 alloy reinforced with insitu V2O5 particles by using stir casting technique. The composites were produced by the addition of oxide particles in different weight percentage. The effect of oxide powder addition on microstructure and mechanical properties of produced composites were investigated. The effect of heat treatment on microstructure and mechanical properties were investigated by optical microscope, Microhardness tester and tension test. A significant improvement in hardness and tensile strength was revealed in the produced composite as compared to the base alloy. With the addition of oxide particles, the shape and size of eutectic Si changed which in turn affects the properties. It was observed that 2h solutionizing followed by the artificial aging was sufficient to make the structure homogenize and to produce the hardening precipitates. The improvement in the mechanical properties has been observed due to the age hardening precipitates in addition with refinement of insitu V2O5 particles.

Effect of Cold Deformation on Microstructure and Mechanical Properties of Mg-8Gd-3Y-0.5Zr Alloy

2012 ◽  
Vol 706-709 ◽  
pp. 1297-1302
Author(s):  
De Jiang Li ◽  
Xiao Qin Zeng ◽  
Xin Su ◽  
Yan Cai Xie ◽  
Wen Jiang Ding
Keyword(s):  
Mechanical Properties ◽  
Cold Rolling ◽  
Cold Deformation ◽  
Tensile Tests ◽  
Age Hardening ◽  
Boundary Structure ◽  
Microstructure Observation ◽  
Microstructure And Mechanical Properties ◽  
Peak Aging ◽  
State 1

Pre-cold rolling with the reduction of 15% was employed on Mg-8Gd-3Y-0.5Zr (wt.%) (GW83K) alloy in different initial states: as-extruded (state 1) and extruded followed by annealing (state 2) with the aim to investigate the effects on microstructure and mechanical properties. Microstructure observation revealed that there are more amounts of mechanical twins in the alloy in state 2 than that of the alloy in state 1 after cold rolling, which indicates the different deformation mechanisms. Further investigation through EBSD has elucidated the grain boundary structure and types of twins in the alloys. Pre-cold deformation greatly promotes the age hardening response and the peak aging time at 200°C was found to be nearly 12h for the alloy in both state 1 and state 2, which were about 24h and 80h less than that of their non-deformed counterparts, respectively. Tensile tests at temperatures lower than 250°C showed that the alloy in state 1 has a predominant mechanical property than that of the alloy in state 2, while at 300°C, it displayed a reverse tendency.

The Effect of Heat Treatment on Microstructure and Mechanical Properties of ZK60 Alloy

2007 ◽  
Vol 353-358 ◽  
pp. 718-721
Author(s):  
Ding Fei Zhang ◽  
Rong Shen Liu ◽  
Jian Peng ◽  
Wei Yuang ◽  
Hong Ju Zhang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid Solution ◽  
Age Hardening ◽  
Second Phase ◽  
Solid Solution Strengthening ◽  
Microstructure And Mechanical Properties ◽  
Long Time ◽  
Zk60 Alloy ◽  
Solution Strengthening

With different heat treatment, the microstructure and mechanical properties of ZK60 magnesium alloy were investigated. It can be concluded that heat treatment has great effect on mechanical properties of ZK60. With artificial aging after extruding, the precipitation of the second phase from the supersaturated solid solution significantly improved mechanical properties. It can greatly increase yield strength of ZK60 alloy, while the tensile strength has little change. For the combination of solid solution strengthening and age hardening, two opposite factors must be considered. On one hand, the solid solution strengthening and the later precipitation strengthening is good for alloy’s strength; on the other hand, the properties decrease as the grains grew under high temperature for a long time during solution heating.

Investigation on the Microstructure and Mechanical Properties of Hot Forged Mg−8Gd−2Y−1Nd−0.3Zn−0.6Zr Alloy

2011 ◽  
Vol 284-286 ◽  
pp. 1598-1602 ◽  
Author(s):  
Xiu Li Hou ◽  
Zhan Yi Cao ◽  
Li Dong Wang ◽  
Li Min Wang
Keyword(s):  
Mechanical Properties ◽  
Large Strain ◽  
Hot Forging ◽  
Tensile Tests ◽  
Age Hardening ◽  
Secondary Phases ◽  
Ageing Treatment ◽  
Size Refinement ◽  
Microstructure And Mechanical Properties ◽  
Peak Aged

The influences of hot forging and ageing treatment on the microstructure and mechanical properties of Mg−8Gd−2Y−1Nd−0.3Zn−0.6Zr (wt.%) alloy have been investigated. The results showed that the grains were significantly refined after hot forging. And the secondary phases in this alloy i.e. Mg5(Gd1-x-yNdxYy) and Mg24(Y1-x-yGdxNdy)5phases were fragmented to small particles due to the large strain during hot forging. Tensile tests revealed that mechanical properties were improved due to grain size refinement. Moreover, the as-forged alloy exhibited remarkable age-hardening response and mechanical properties were further improved by ageing treatment. The ultimate tensile strength, yield strength and elongation of the peak-aged (T5) alloy are 286 MPa, 245 MPa and 5.6 % at room temperature, and 211 MPa, 103 MPa and 19.4 % at 300°C, respectively.

Effect of Silicon Content on the Microstructure and Mechanical Properties of Niobium–Silicon Alloy

2019 ◽  
Vol 83 (10) ◽  
pp. 1235-1243 ◽  
Author(s):  
M. I. Karpov ◽  
V. I. Vnukov ◽  
T. S. Stroganova ◽  
D. V. Prokhorov ◽  
I. S. Zheltyakova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Content ◽  
Silicon Alloy ◽  
Microstructure And Mechanical Properties
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