Non-linear effects of initial melt temperatures on microstructures and mechanical properties during quenching process of liquid Cu46Zr54 alloy

Mo, Yibo; Rang-Su, Liu; Liang, Yong-Chao; Zhang, Haitao; Hou, Zhaoyang; Zhang, Ailong; Zhou, Lun; Peng, Ping; Xie, Zhong

doi:10.1016/j.physb.2015.02.020

Cited by 6 publications

(2 citation statements)

References 54 publications

(69 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These findings imply that ICO-like VPs play a key role during the glass transition; in particular, inside the supercooled region. The evolution of the fraction of ICO-like clusters during the solidification procedure is in a qualitative agreement with findings in other alloys such as Cu-Zr[31,32,34,35,4].For the Al 50 Sm 50 alloy, the population of all the VPs remains approximately constant during quenching. For example, the populations of the ICO-like VPs and of the mixed VPs, respectively, change by less than 5% and 2% between 1,500K and 2K.…”

supporting

confidence: 88%

On the role of Sm in solidification of Al-Sm metallic glasses

et al. 2016

View full text Add to dashboard Cite

During the solidification of Al-Sm metallic glasses the evolution of the supercooled liquid atomic structure has been identified with an increasing population of icosahedral-like clusters with increasing Sm concentration. These clusters exhibit slower kinetics compared to the remaining clusters in the liquid leading to enhanced amorphous phase stability and glass forming ability (GFA). Maximum icosahedral-ordering and atomic packing density have been found for the Al 90 Sm 10 and Al 85 Sm 15 alloys, respectively, whereas minimum cohesive energy has been found for the Al 93 Sm 7 which is consistent with the range of compositions (from Al 92 Sm 8 to Al 84 Sm 16 ) found experimentally with high GFA.Keywords: metallic glass; short-range order; molecular dynamics; solidification.Metallic glasses (MGs) are known to have attractive mechanical properties such as high strength and high elastic limit, good corrosion and wear resistance and good biocompatibility [1,2,3]. However, the low glass forming ability (GFA) of some MGs has so far hindered synthesis of large MG specimens such as Al-base systems and therefore limited engineering applications of these materials. Many efforts have been devoted towards developing alloys with high GFA [1,4,5]. In particular, a number of studies focused on understanding of the MGs atomic structure and its relation to the MGs' mechanical properties

show abstract

supporting

confidence: 88%

On the role of Sm in solidification of Al-Sm metallic glasses

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Atoms are in a specific local environment. To gain a deeper understanding of the local structure of fast and slow Si atoms, the cluster-type index method-3 (CTIM-3) [33,34] was employed to search and characterize atomic local structures. CTIM-3 is an extended cluster-type index method derived from the H-A [35] bond-type index to describe the topological structures of different atomic clusters.…”

Section: Resultsmentioning

confidence: 99%

Research of caged dynamics of clusters center atoms in Pd₈₂Si₁₈ amorphous alloy

Deng 邓,

Chen 陈,

Qi 祁

et al. 2024

Chinese Phys. B

View full text Add to dashboard Cite

To date, there is still a lack of a comprehensive explanation for caged dynamics which is regarded as one of the intricate dynamic behaviors in amorphous alloys. This study focuses on Pd82Si18 as the research object to further elucidate the underlying mechanism of caged dynamics from multiple perspectives, including the cage’s lifetime, atomic local environment, and atomic potential energy. The results reveal that Si atoms exhibit a pronounced cage effect due to the hindrance of Pd atoms, resulting in an anomalous peak in the non-Gaussian parameters. An in-depth investigation was conducted on the caged dynamics differences between fast and slow Si atoms. In comparison to fast Si atoms, slow Si atoms were surrounded by more Pd atoms and occupied lower potential energy states, resulting in smaller diffusion displacements for the slow Si atoms. Concurrently, slow Si atoms tend to be in the centers of smaller clusters with coordination numbers of 9 and 10. During the isothermal relaxation process, clusters with coordination numbers 9 and 10 have longer lifetimes, suggesting that the escape of slow Si atoms from their cages is more challenging. The findings mentioned above hold significant implications for understanding the caged dynamics.

show abstract