Results 21 to 30 of about 35,767 (354)

Native grain refinement of magnesium alloys

Scripta Materialia, 2005
High purity Mg–Al type alloys have a naturally fine grain size compared to commercial purity alloys with the same basic composition. This is referred to as native grain refinement.
Peng Cao, M Qian, David H Stjohn
exaly   +2 more sources

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   +2 more sources

A comparative study of the role of solute, potent particles and ultrasonic treatment during solidification of pure Mg, Mg–Zn and Mg–Zr alloys

Journal of Magnesium and Alloys, 2021
Ultrasonic treatment (UST) applied during the solidification of pure Mg, eutectic (Mg – Zn) and peritectic (Mg – Zr) alloys was investigated in order to explore the grain refinement mechanisms.
Nagasivamuni Balasubramani, Gui Wang, Mark A. Easton, David H. StJohn, Matthew S. Dargusch   +4 more
doaj   +1 more source

Grain Refinement of Aluminum and Aluminum Alloys by Sc and Zr

Metals, 2023
Rare earth elements and transition elements are widely used in aluminum alloys, magnesium alloys and copper alloys due to their unique microalloying effects.
Zhiguo Lei, Shengping Wen, Hui Huang, Wu Wei, Zuoren Nie   +4 more
doaj   +1 more source

Recent Advances in the Grain Refinement Effects of Zr on Mg Alloys: A Review

Metals, 2022
As the lightest structural materials, Mg alloys show great effectiveness at energy saving and emission reduction when applied in the automotive and aerospace fields.
Ming Sun, Depeng Yang, Yu Zhang, Lin Mao, Xikuo Li, Song Pang   +5 more
doaj   +1 more source

Investigation of Ti1−x(Zr,Ta,V,W)xB2 and Al3Ti1−x(Zr,V)x grain refiners in additively manufactured Al-2 wt%Cu alloys by a high throughput method

Materials & Design, 2022
Grain refinement plays a central role in powder bed fusion (PBF) additive manufacturing by preventing hot cracking and thus enabling the development of high-strength alloys.
Freddy Leijon, Erik Johansson, Jun Lu, Björn Aling, Svein Skjervold, Johan Moverare   +5 more
doaj   +1 more source

Solute Effect on Grain Refinement of Al- and Mg-Alloys: An Overview of the Recent Advances Made by the LiME Research Hub

Metals, 2022
Grain refinement is of importance for metallic materials since it provides multiple benefits, such as improved castability, reduced casting defects and improved mechanical properties.
Feng Gao, Zhongyun Fan
doaj   +1 more source

Grain refinement and improvement of mechanical properties of AZ31 magnesium alloy inoculated by in-situ oxidation process

Journal of Materials Research and Technology, 2021
Grain refinement is an important technique to improve the mechanical properties of metal materials. In this study, a novel technique (in-situ oxidation process) was proposed.
Hengbin Liao, Liling Mo, Xiong Zhou, Bing Zhao, Jun Du   +4 more
doaj   +1 more source

Understanding dual-frequency ultrasonic melt treatment on grain refinement and mechanical properties improvement of AZ80 magnesium alloy: experiment and simulation

Journal of Materials Research and Technology, 2021
This work investigated the acoustic pressure distribution and relevant cavitation area of the dual-frequency ultrasonic field (DUF) in magnesium melt using numerical simulation.
Xingrui Chen, Yonghui Jia, Qichi Le, Shaochen Ning, Zhaoyang Yin, Chenglu Hu, Fuxiao Yu   +6 more
doaj   +1 more source

Designing grain refinement passes for multi-direction forging: A phase-field crystal study

Journal of Materials Research and Technology, 2023
Multi-directional forging is an effective plastic deformation method for polycrystalline grain refinement, and the degree of refinement is closely related to the number of forging passes. However, the relationship between the degree of refinement and the
Zhuo Song, Huanqing Li, Xiaona Wang, Xiaolin Tian, Hua Hou, Yuhong Zhao   +5 more
doaj   +1 more source