Modification of microstructure and performance via doping Ti in W–1TiC fine-grained alloy

2021 ◽  
Vol 825 ◽  
pp. 141918
Author(s):  
Ziwei Zhang ◽  
Siqi Zhao ◽  
Yongqi Lv ◽  
Hongbo Zhang ◽  
Zhenwei Wang ◽  
...  
Keyword(s):  
Fine Grained ◽  
And Performance ◽  
Microstructure And Performance

Microstructure and Performance of Nanocrystalline Nickel Parts

2011 ◽  
Vol 287-290 ◽  
pp. 420-423
Author(s):  
Jin Song Chen
Keyword(s):  
Dimensional Accuracy ◽  
Processing Parameters ◽  
X Ray Diffraction ◽  
Nanocrystalline Nickel ◽  
Fine Grained ◽  
Rapid Fabrication ◽  
Jet Electrodeposition ◽  
Fine Grained Structure ◽  
And Performance ◽  
Microstructure And Performance

Jet electrodeposition orientated by rapid fabrication were introduced , The nanocrystalline nickel parts were fabricated using jet electrodeposition . The microstructure and phase transformation of nanocrystalline nickel were observed under the scanning microscope and X-ray diffraction instrument . The results show that the jet electrodeposition can greatly enhance the limited current density, fine crystalline particles and improve deposition quality. The nickel parts prepared by jet electrodeposition own a fine-grained structure with a smooth surface and high dimensional accuracy under the optimum processing parameters.

Effect of Aging on Microstructure and Performance after Superplastic Deformation of Fine Grained 1420 Al-Li Alloy

2014 ◽  
Vol 936 ◽  
pp. 1647-1652
Author(s):  
Yan Ling Zhang ◽  
Hong Liang Hou ◽  
Yao Qi Wang
Keyword(s):  
Mechanical Properties ◽  
Artificial Aging ◽  
Superplastic Forming ◽  
Tensile Tests ◽  
Strengthening Mechanism ◽  
Fine Grained ◽  
And Performance ◽  
Relationship Of ◽  
Microstructure And Performance ◽  
Strength And Ductility

Superplastic forming (SPF) is an important process for forming fine grained 1420 Al-Li alloy. However, the mechanical properties will be decreased after deforming at high temperature. How to obtain the optimize relationship of strength and ductility after SPF is one of the key problems for the process. In this paper, a set of artificial aging tests including single and two-step aging were carried out, which are the typical strengthening process for Al-Li alloy. Based on experimental results, strength and elongation were studied by means of tensile tests at room temperature, and the effect of aging processes on mechanical properties was analyzed. Finally, the microstructures fore and after aging were examined by OM and TEM, and the strengthening mechanism of 1420 Al-Li alloy was further studied. It is found that artificial aging especially two-step aging can increase mechanical properties of post-SPF material obviously, and δ (Al3Li) is the primary strengthening phase.

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