Shear enhanced heterogeneous nucleation in some Mg- and Al-alloys

被引：37

作者：

Fan, Z. ^{[1
]}

Wang, Y. ^{[1
]}

Zhang, Z. F. ^{[1
,2
]}

Xia, M. ^{[1
]}

Li, H. T. ^{[1
]}

Xu, J. ^{[2
]}

Granasy, L. ^{[1
]}

Scamans, G. M. ^{[1
]}

机构：

[1] Brunel Univ, BCAST, Uxbridge UB8 3PH, Middx, England

[2] Gen Res Inst NonFerrous Met, Beijing 100088, Peoples R China

来源：

INTERNATIONAL JOURNAL OF CAST METALS RESEARCH | 2009年 / 22卷 / 1-4期

关键词：

Solidification; Heterogeneous Nucleation; Grain refinement; GRAIN-REFINEMENT; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; CONVECTION; FE;

D O I：

10.1179/136404609X367452

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Intensive shearing was applied to alloy melts at temperatures above their liquidus by using a twin-screw mechanism. The sheared melt was then cast into a TP1 mould for microstructural examination. Alloy melts with or without shearing were also filtered using the Prefil technique developed by N-Tech Ltd in order to analyse oxides and other second phase particles. The experimental results showed a significant grain refinement through enhancement of heterogeneous nucleation. The intensive melt shearing converted oxide films and agglomerates into well dispersed fine particles with a narrow size distribution. It was confirmed that the fine oxide particles can act as potent sites for nucleation during the solidification of the sheared melt. This paper presents the experimental results and theoretical analysis of shear enhanced heterogeneous nucleation during solidification of Mg- and Al-alloys. A multi-step heterogeneous nucleation mechanism has been proposed and discussed.

引用

页码：318 / 322

页数：5

共 50 条

[41] Heterogeneous nucleation mechanisms of TiB2 particles in Al alloys
McKay, BJ
Schumacher, P
SHAPING CASTING: THE JOHN CAMPBELL SYMPOSIUM, 2005, : 155 - 164
[42] Heterogeneous nucleation mechanism in Al-Fe-Si amorphous alloys
Schumacher, P
Cizek, P
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 304 (1-2): : 215 - 219
[43] The first principle research of CaO and MgO particulate heterogeneous nucleation in Mg alloys
Shen, Guangxin
Lyu, Shaoyuan
Zhao, Yun
You, Chen
Wang, Xuewei
Chen, Minfang
APPLIED SURFACE SCIENCE, 2022, 593
[44] The effect of Si additions on the nucleation of Ω in Al-Cu-Mg alloys
Gable, BM
Shiflet, GJ
Starke, EA
THERMEC'2003, PTS 1-5, 2003, 426-4 : 471 - 476
[45] Deformation assisted nucleation of continuous nanoprecipitates in Mg-Al alloys
Prameela, Suhas Eswarappa
Yi, Peng
Medeiros, Beatriz
Liu, Vance
Kecskes, Laszlo J.
Falk, Michael L.
Weihs, Timothy P.
MATERIALIA, 2020, 9
[46] NUCLEATION AND GROWTH OF PRECIPITATES IN AL-CU-MG-AG ALLOYS
SCOTT, VD
KERRY, S
TRUMPER, RL
MATERIALS SCIENCE AND TECHNOLOGY, 1987, 3 (10) : 827 - 835
[47] Morphology and Nucleation of Intermetallic Phases in Casting Al–Mg–Si Alloys
Anna Slyudova
Oleksandr Trudonoshyn
Olena Prach
Vitaliy Lisovskii
Metallography, Microstructure, and Analysis, 2020, 9 : 873 - 883
[48] Calculations of charge transfer in Mg- and Al-transition metal alloys using the Auger parameter
Diplas, S., 2000, John Wiley & Sons Ltd, Chichester, United Kingdom (29)
[49] Calculations of charge transfer in Mg- and Al-transition metal alloys using the Auger parameter
Diplas, S
Shao, G
Tsakiropoulos, P
Watts, JF
Matthew, JAD
SURFACE AND INTERFACE ANALYSIS, 2000, 29 (01) : 65 - 72
[50] On the origin of the heterogeneous precipitation and dissolution in Al-Mg alloys
Hamana, Djamel
Nebti, Samia
Bouchear, Merzoug
Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, 1996, 87 (02): : 135 - 139

← 1 2 3 4 5 →