Results 251 to 260 of about 1,628,826 (288)

Effects of ultrasonic peening treatment in three directions on grain refinement and anisotropy of cold metal transfer additive manufactured Ti-6Al-4V thin wall structure

Journal of Manufacturing Processes, 2020
In the cold metal transfer additive manufacturing process of Ti-6Al-4V thin wall structure, ultrasonic peening treatment (UPT) in three directions is proposed to refine the large columnar prior-β grains and secondary α grains, and to improve anisotropy ...
J. Gou, Zhijiang Wang, Shengsun Hu, Junqi Shen, Yinbao Tian, G. Zhao, You-Quan Chen   +6 more
semanticscholar   +1 more source

Grain Refinement in Undercooled Metals

MRS Proceedings, 1997
ABSTRACTRecently, it was demonstrated that grain refinement in metals can take place through two mechanisms, namely, dynamic nucleation and remelting of initially formed dendrites. In this study, it was found that Ni99.45B0.55 undergoes grain refinement, both by dynamic nucleation or by remelting, depending on the initial bulk undercooling just before ...
J. Z. Xiao, H. Yang, H. W. Kui
openaire   +1 more source

Regulation of energy density and efficiency in transparent ceramics by grain refinement

Chemical Engineering Journal, 2020
Seeking for lead-free transparent ferroelectric ceramics with excellent recoverable energy storage density (Wrec) and high energy storage efficiency (η) is conducive to the development of transparent pulse capacitors for use in energy storage.
Xiaodan Ren, Li Jin, Zhanhui Peng, Bi Chen, Xiaoshuang Qiao, Di Wu, Guorong Li, Hongliang Du, Zupei Yang, X. Chao   +9 more
semanticscholar   +1 more source

Grain refinement of steel castings

JOM, 1967
Titanium inoculation has been shown to be capable of refining the as cast structure of AISI 4335 steel. This refinement consists of changing axed grains and reducing the spacing of the secondary dendrite arms. the structure from columnar to equi-When this steel is heat treated to high strength levels (250,000 psi tensile strength) by conventional ...
Peter F. Wieser, John F. Wallace, N. Church   +2 more
openaire   +1 more source

Recent Development in Friction Stir Processing as a Solid-State Grain Refinement Technique: Microstructural Evolution and Property Enhancement

Critical reviews in solid state and materials sciences, 2019
Increasing demand of lightweight structures with exceptional properties elicits materials processing and manufacturing technologies to tailor blanks in order to achieve or enhance those prerequisite properties.
Vivek V. Patel, Wenya Li, A. Vairis, V. Badheka   +3 more
semanticscholar   +1 more source

Grain Refining of Pure Aluminum

2012
Grain refiners are currently used in casting aluminum alloys to reduce the grain size and to produce equiaxed grains during solidification of the alloys. Using inoculants to refine grains makes alloys castable but produces several disadvantages, including particle agglomerates, local defects, and impurities.
L. Han, C. Vian, J. Song, Z. Liu, Q. Han, C. Xu, L. Shao   +6 more
openaire   +1 more source

Can zinc alloys be strengthened by grain refinement? A critical evaluation of the processing of low-alloyed binary zinc alloys using ECAP

Materials Science & Engineering: A, 2019
In this work, the effect of equal channel angular pressing (ECAP) on the microstructure and mechanical properties of zinc and zinc alloys with Ag, Cu, and Mn additions (0.5 at%) was investigated.
W. Bednarczyk, M. Wątroba, J. Kawałko, P. Bała   +3 more
semanticscholar   +1 more source

Influence of grain refinement on the corrosion behavior of metallic materials: A review

International Journal of Minerals, Metallurgy, and Materials, 2021
Panjun Wang, Ling-wei Ma, Xuequn Cheng, Xiao-gang Li   +3 more
semanticscholar   +1 more source

Grain refinement of hypoeutectic Al-7wt.%Si alloy induced by an Al–V–B master alloy

, 2020
The current study investigates the grain refinement of an Al-7wt%Si alloy with addition of Al–V–B master alloy. It is found that the Al–V–B master alloys can overcome the Si poison effect on grain refinement and refine the as cast grain structure of the ...
Y.H. Zhang, C. Ye, Y. Shen, W. Chang, D. StJohn, G. Wang, Q. Zhai   +6 more
semanticscholar   +1 more source

Grain refinement in electrogalvanized coatings

Materials Characterization, 2003
Abstract The effects of grain-refining additives on the morphology and surface roughness of zinc deposits plated at 80 A/dm 2 is presented. Atomic force microscopy (AFM) images show zinc deposits plated without additives are rough and are not of commercial quality.
openaire   +1 more source