Microstructures and mechanical properties of directionally solidified C-containing γ-TiAl alloys via electromagnetic cold crucible

2019 ◽  
Vol 113 ◽  
pp. 106587 ◽  
Author(s):  
Qiang Wang ◽  
Liangcai Zeng ◽  
Hongsheng Ding ◽  
Ruirun Chen ◽  
Jingjie Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cold Crucible ◽  
Directionally Solidified ◽  
Tial Alloys ◽  
Microstructures And Mechanical Properties

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 Microstructures and mechanical properties of directionally solidified multi-element Nb-Si alloy

2011 ◽  
Vol 21 (2) ◽  
pp. 146-152 ◽  
Author(s):  
Qiang HUANG ◽  
Xi-ping GUO ◽  
Yong-wang KANG ◽  
Jin-xia SONG ◽  
Shi-yu QU ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Directionally Solidified ◽  
Microstructures And Mechanical Properties
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