Effect of Si addition and applied pressure on microstructure and tensile properties of as-cast Al-5.0Cu-0.6Mn-1.2Fe alloys

被引：26

作者：

Zhang, Wei-wen ^{[1
]}

Zhao, Yu-liang ^{[1
]}

Zhang, Da-tong ^{[1
]}

Luo, Zong-qiang ^{[1
]}

Yang, Chao ^{[1
]}

Li, Yuan-yuan ^{[1
]}

机构：

[1] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510641, Guangdong, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2018年 / 28卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Al-Cu alloys; Si addition; solidification; tensile properties; microstructure; RICH INTERMETALLIC PHASES; SOLID-STATE TRANSFORMATION; COPPER B206 ALLOYS; MECHANICAL-PROPERTIES; IRON; CU; ALUMINUM; FE; PRECIPITATION; SELECTION;

D O I：

10.1016/S1003-6326(18)64765-X

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of Si addition and applied pressure on the microstructure and tensile properties of as-cast Al-5.0Cu-0.6Mn1.2Fe alloys were studied. The results show that Si addition promotes the formation of Chinese script alpha-Fe, and suppresses the precipitation of Al-3(FeMn) and Al-6(FeMn). For the alloys produced without pressure, Si addition increases the volume fraction of porosity, resulting in remarkable decrease in ultimate tensile strength (UTS) and yield strength (YS). For the alloys produced with 75 MPa pressure, Si addition improves UTS and YS owing to the formation of high number density of Al2Cu (theta) phases. The tensile properties of alloys increase with increasing applied pressure at the same Si content level, which is attributed to elimination of porosity, grain refinement strengthening and solid-solution strengthening. The alloy with 1.1% Si addition and 75 MPa pressure shows the best tensile properties, where the UTS, YS and elongation are 237 MPa, 140 MPa and 9.8%, respectively.

引用

页码：1061 / 1072

页数：12

共 39 条

[1] Microstructure characterization and tensile properties of squeeze-cast AlSiMg alloys [J].