Effect of growth rate on microstructure and mechanical properties of directionally solidified multiphase intermetallic Ni–Al–Cr–Ta–Mo–Zr alloy

2006 ◽  
Vol 14 (10-11) ◽  
pp. 1339-1344 ◽  
Author(s):  
J. Lapin ◽  
J. Mareček
Keyword(s):  
Mechanical Properties ◽  
Growth Rate ◽  
Directionally Solidified ◽  
Microstructure And Mechanical Properties ◽  
Zr Alloy

scholarly journals Directional solidification of Zn-Al-Cu eutectic alloy by the vertical Bridgman method

2015 ◽  
Vol 51 (1) ◽  
pp. 67-72 ◽  
Author(s):  
U. Büyük ◽  
S. Engin ◽  
N. Maraşlı
Keyword(s):  
Mechanical Properties ◽  
Growth Rate ◽  
Temperature Gradient ◽  
Eutectic Alloy ◽  
Temperature Gradients ◽  
Directionally Solidified ◽  
Constant Growth Rate ◽  
Microstructure And Mechanical Properties ◽  
Vertical Bridgman ◽  
Constant Growth

In the present work, the effect of growth rate and temperature gradient on microstructure and mechanical properties of Zn-7wt.%Al-4wt.%Cu eutectic alloy has been investigated. Alloys prepared under steady-state conditions by vacuumed hot filing furnace. Then, the alloys were directionally solidified upward with different growth rates (V=11.62-230.77 mm/s) at a constant temperature gradient (G=7.17 K/mm) and with different temperature gradients (G=7.17-11.04 K/mm) at a constant growth rate (V=11.62 mm/s) by a Bridgman furnace. The microstructures were observed to be lamellae of Zn, Al and broken lamellae CuZn4 phases from quenched samples. The values of eutectic spacing, microhardness and ultimate tensile strength of alloys were measured. The dependency of the microstructure and mechanical properties on growth rate and temperature gradient were investigated using regression analysis.

Effect of Nd addition on the microstructure and mechanical properties of extruded Mg-Gd-Zr alloy

2021 ◽  
Vol 816 ◽  
pp. 141320
Author(s):  
Bin Lei ◽  
Bin Jiang ◽  
Huabao Yang ◽  
Zhihua Dong ◽  
Qinghang Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Nd Addition ◽  
Zr Alloy

Effects of pre-annealing on microstructure and mechanical properties of as-extruded Mg-Gd-Y-Zn-Zr alloy

2017 ◽  
Vol 729 ◽  
pp. 627-637 ◽  
Author(s):  
Zijian Yu ◽  
Chao Xu ◽  
Jian Meng ◽  
Xuhu Zhang ◽  
Shigeharu Kamado
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Zr Alloy

Dependence of Microstructures and Mechanical Properties on the Growth Rate and Composition in Directionally Solidified Mg-Gd Alloys

2022 ◽  
Vol 327 ◽  
pp. 82-97
Author(s):  
He Qin ◽  
Guang Yu Yang ◽  
Shi Feng Luo ◽  
Tong Bai ◽  
Wan Qi Jie
Keyword(s):  
Mechanical Properties ◽  
Growth Rate ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Dendritic Structure ◽  
Directionally Solidified ◽  
Dendrite Morphology ◽  
Microstructural Parameters ◽  
Wide Range ◽  
Microstructures And Mechanical Properties

Microstructures and mechanical properties of directionally solidified Mg-xGd (5.21, 7.96 and 9.58 wt.%) alloys were investigated at a wide range of growth rates (V = 10-200 μm/s) under the constant temperature gradient (G = 30 K/mm). The results showed that when the growth rate was 10 μm/s, different interface morphologies were observed in three tested alloys: cellular morphology for Mg-5.21Gd alloy, a mixed morphology of cellular structure and dendritic structure for Mg-7.96Gd alloy and dendrite morphology for Mg-9.58Gd alloy, respectively. Upon further increasing the growth rate, only dendrite morphology was exhibited in all experimental alloys. The microstructural parameters (λ1, λ2) decreased with increasing the growth rate for all the experimental alloy, and the measured λ1 and λ2 values were in good agreement with Trivedi model and Kattamis-Flemings model, respectively. Vickers hardness and the ultimate tensile strength increased with the increase of the growth rate and Gd content, while the elongation decreased gradually. Furthermore, the relationships between the hardness, ultimate tensile strength, the growth rate and the microstructural parameters were discussed and compared with the previous experimental results.

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.

Microstructure and Mechanical Properties of Cu-Ag-Zr Alloy

2013 ◽  
Vol 22 (12) ◽  
pp. 3884-3889 ◽  
Author(s):  
S. Chenna Krishna ◽  
K. Thomas Tharian ◽  
Bhanu Pant ◽  
Ravi S. Kottada
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Zr Alloy

Effects of minor Y addition on microstructure and mechanical properties of Mg–Nd–Zn–Zr alloy

2017 ◽  
Vol 32 (19) ◽  
pp. 3712-3722 ◽  
Author(s):  
Yushi Chen ◽  
Guohua Wu ◽  
Wencai Liu ◽  
Liang Zhang ◽  
Haohao Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Image Position ◽  
Zr Alloy

Abstract

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