Dendrite core grain refining and interdendritic coarsening behaviour in W-containing γ-TiAl based alloys

2013 ◽  
Vol 552 ◽  
pp. 213-218 ◽  
Author(s):  
H.L. Sun ◽  
Z.W. Huang ◽  
D.G. Zhu ◽  
X.S. Jiang
Keyword(s):  
Dendrite Core ◽  
Grain Refining

Grain-refining and strengthening mechanisms of bulk ultrafine grained CP-Ti processed by L-ECAP and MDF

2021 ◽  
Vol 83 ◽  
pp. 196-207
Author(s):  
Peng-Cheng Zhao ◽  
Guang-Jian Yuan ◽  
Run-Zi Wang ◽  
Bo Guan ◽  
Yun-Fei Jia ◽  
...  
Keyword(s):  
Grain Refining ◽  
Strengthening Mechanisms ◽  
Ultrafine Grained ◽  
Cp Ti

Grain refining of casting alloys by a melting control technique

1996 ◽  
Vol 9 (4) ◽  
pp. 187-193 ◽  
Author(s):  
Xu Darning ◽  
Li Qingchun ◽  
Robert D. Pehlke
Keyword(s):  
Control Technique ◽  
Grain Refining ◽  
Casting Alloys

scholarly journals Grain refining of Ti-6Al-4V alloy fabricated by laser and wire additive manufacturing assisted with ultrasonic vibration

2021 ◽  
Vol 73 ◽  
pp. 105472
Author(s):  
Ding Yuan ◽  
Shuaiqi Shao ◽  
Chunhuan Guo ◽  
Fengchun Jiang ◽  
Jiandong Wang
Keyword(s):  
Additive Manufacturing ◽  
Ultrasonic Vibration ◽  
Grain Refining

Influences of Super-Gravity Field on Aluminum Grain Refining

2010 ◽  
Vol 41 (3) ◽  
pp. 670-675 ◽  
Author(s):  
Lixin Zhao ◽  
Zhancheng Guo ◽  
Zhi Wang ◽  
Mingyong Wang
Keyword(s):  
Gravity Field ◽  
Grain Refining

Effect of C/Ti Ratio and Al Powder Size on Microstructure and Performance of Al-Ti-C Grain Refiner

2007 ◽  
Vol 353-358 ◽  
pp. 2981-2984
Author(s):  
Chun Xiang Xu ◽  
Li Ping Liang ◽  
Bin Feng Lu ◽  
Jin Shan Zhang ◽  
Wei Liang
Keyword(s):  
Powder Size ◽  
Grain Refining ◽  
Grain Refiner ◽  
Casting Method ◽  
High Temperature Synthesis ◽  
Method Effects ◽  
Refining Performance ◽  
Al Powder ◽  
And Performance ◽  
Microstructure And Performance

Al-Ti-C grain refiners have been prepared by combining self-propagating high-temperature synthesis (SHS) technique and melting-casting method. Effects of Al powder size and C/Ti ratio on the microstructures and grain-refining efficiency of Al-Ti-C grain refiners were studied by OM, XRD, SEM and EDS. The results show that when Al powder size is fine, and C/Ti ratio is 1: 8, SHS reaction among the mixed powders can easily carry on in the melt. As a result, the prepared grain refiner consists of blocky Al3Ti and fine TiC particles distributed in Al matrix, and exhibits excellent grain refining performance on commercially pure Al.

scholarly journals THE EFFECT OF CeO2 NANOPARTICLE DOPING ON REFINEMENT OF Y-211 PARTICLES IN POIG PROCESSED YBCO COMPOSITES

2013 ◽  
Vol 22 ◽  
pp. 497-500
Author(s):  
P. MISSAK SWARUP RAJU ◽  
S. PAVAN KUMAR NAIK ◽  
N. DEVENDRA KUMAR ◽  
T. RAJASEKHARAN ◽  
V. SESHUBAI
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Weight Percent ◽  
Structural Defects ◽  
Grain Refining ◽  
Pinning Centers ◽  
Ybco Superconductors ◽  
Fine Microstructure ◽  
Refining Agent ◽  
Processing Techniques

Doping of non-interacting nanoparticles in YBCO superconductors in order to get fine microstructure defects has been studied. Y-211 inclusion, itself has large potential to create structural defects without affecting Y-123 matrix phase. Nanoparticles of grain refining agent like CeO2/Pt/PtO2 are interesting dopants, especially CeO2 for being cheaper than Pt. POIG process, as is one of the advance processing techniques to get uniform distribution of fine Y-211 particles of the order of 1-2 μm, throughout the YBCO composites. Finer Y-211 particles can drastically increase the pinning centers. Introduction of fine sized CeO2 as grain refining agent to reduce the size of Y-211 particles would create additional pinning centers. In the present work, the effect of CeO2 on Y-211size and distribution in POIG processed YBCO composite was studied. It was observed that with increase in CeO2 content Y-211 particle size decreases below 1μm and even less than 0.5μm for 10 weight percent CeO2 doping. The mechanism for refinement appears to be the formation of BaCeO3 on the surface of Y-211 during liquid phase infiltration that leads to splitting of Y-211 into smaller particles.

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