The effects of boron additions on the microstructure, hardness and tensile properties of in situ Al-15%Mg2Si composite

被引：24

作者：

Azarbarmas, Mortaza ^{[1
]}

Emamy, Masoud ^{[1
]}

Karamouz, Mostafa ^{[1
]}

Alipour, Mohammad ^{[1
]}

Rassizadehghani, Jafar ^{[1
]}

机构：

[1] Univ Tehran, Sch Met & Mat, Tehran, Iran

来源：

MATERIALS & DESIGN | 2011年 / 32卷 / 10期

关键词：

MG2SI; AL-MG2SI; KBF4;

D O I：

10.1016/j.matdes.2011.05.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work the influences of Boron (B) content on the microstructure, hardness and mechanical properties of Al-15%Mg2Si composite were investigated. The results showed that with the increase of B content, the average size of primary Mg2Si particles decreased from similar to 23 to similar to 5 mu m and the volume fraction of them decreased too, but the amount of alpha phase increased. It was found that with the addition of 0.3%B, the ultimate tensile strength (UTS) and elongation values reached from 252 to 273 MPa and 2.2% to 3.7%, respectively. It was revealed from hardness tests that B decreases the hardness values of the composite. Also, a small amount of Boride compounds formed as a result of the addition of B, which were the main reason of the decreasing of tensile properties at samples with high B. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：5049 / 5054

页数：6

共 20 条

[1] AMAMY M, 2010, MAT SCI ENG A-STRUCT, V527, P2998
[2] *ASTM, 2001, ANN BOOK ASTM STAND, V301
[3] *ASTM, 2003, ANN BOOK ASTM STAND, V202
[4] BASTERCI M, 2008, METHOD ACTA METALL S, V14, P7
[5] The grain boundary microstructures of the base and modified RR 2072 bicrystal superalloys and their effects on the creep properties
Chen, QZ
Jones, CN
Knowles, DM
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 385 (1-2): : 402 - 418
[6] The influence of pure Na on the microstructure and tensile properties of Al-Mg2Si metal matrix composite
Emamy, M.
Khorshidi, R.
Raouf, A. Honarbakhsh
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (13-14): : 4337 - 4342
[7] The effect of Li on the tensile properties of cast Al-Mg2Si metal matrix composite
Hadian, R.
Emamy, M.
Varahram, N.
Nemati, N.
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 490 (1-2): : 250 - 257
[8] Modification of Cast Al-Mg2Si Metal Matrix Composite by Li
Hadian, R.
Emamy, M.
Campbell, J.
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2009, 40 (06): : 822 - 832
[9] Refinement and modification performance of Al-P master alloy on primary Mg2Si Al-Mg-Si alloys
Li, Chong
Liu, Xiangfa
Wu, Yuying
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 465 (1-2) : 145 - 150
[10] Microstructural formation in hypereutectic Al-Mg2Si with extra Si
Li, Chong
Wu, Yuying
Li, Hui
Liu, Xiangfa
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 477 (1-2) : 212 - 216

← 1 2 →