Effects of Nd on microstructure and mechanical properties of cast Al-Si-Cu-Ni-Mg piston alloys

被引：62

作者：

Han, Lina ^{[1
]}

Sui, Yudong ^{[1
]}

Wang, Qudong ^{[2
,3
]}

Wang, Kui ^{[2
,3
]}

Jiang, Yehua ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, 253 Xuefu Rd, Kunming 650093, Peoples R China

[2] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys Net Forming, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

[3] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composite, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 695卷

关键词：

Nd-containing compounds; Microstructure; Mechanical properties; Cast Al-Si-Cu-Ni-Mg piston alloy; HIGH-TEMPERATURE STRENGTH; CREEP RESISTANCE; HEAT-TREATMENT; ZR; ALUMINIDES; ELEMENTS; TENSILE;

D O I：

10.1016/j.jallcom.2016.10.300

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Effects of Nd content on the microstructure and mechanical properties of gravity cast Al-12Si-4Cu-2Ni0.8Mg alloys are reported. Metallographic and image analysis techniques have been used to quantitatively examine the microstructural changes at different Nd contents. It is found that adding 0.2% Nd to the as-cast Al-12Si-4Cu-2Ni-0.8Mg alloys has little influence on tensile properties at ambient temperature, but improves them at elevated temperature. The optimal UTS is 118.5 MPa at 300 degrees C and 74.2 MPa at 350 degrees C. It is due to the disappearance of the unstable phases at high temperature such as theta-Al2Cu, gamma-Al7Cu4Ni and parts of Q-Al5Cu2Mg8Si6 and formation of the high melting block-like Nd-containing phases. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1566 / 1572

页数：7

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