The Effect of RE on the Microstructure and Properties of Weld of 7075 Aluminum Alloy

In this paper 7075 aluminum alloy is studied as the object, through adding different percentages of the rare earth elements expecting to optimize alloy formula and find the optimal dosage of rare earth in order to improve the microstructure and properties of weld. The results show that when the rare earth content reaches 0.3%, alloys tensile strength comes to 388.39 MPa, and extensibility 18.22%. Compared with the control group, tensile strength is increased about 8.4%, extensibility about 14.7%, and the integrative mechanical performance is optimal. Metallographic research shows that accession of rare earth elements have perfect refinement effect to the microstructure of 7075 aluminum alloy and can improve the quality of weld.

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Effect of RE on the Mechanical Properties of 7075 Al Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.150-151.1286 ◽

2010 ◽

Vol 150-151 ◽

pp. 1286-1289

Author(s):

Jian Hua Zhong ◽

Kai Feng ◽

Hong Bin Zhu ◽

Yin Ping Xiao

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Rare Earth ◽

Mechanical Performance ◽

Aging Treatment ◽

Al Alloy ◽

Optimal Dosage ◽

7075 Al Alloy ◽

Object Of Study ◽

The Rare Earth

We set 7075 Al alloy as the object of study,expecting to optimize alloy formula and find the optimal dosage of rare earth in order to improve its mechanical properties by adding different percentages of the rare earth elements,the results show that:When the rare earth content reaches 0.3%,with the two-stage aging treatment,7075 Al alloy′s tensile strength comes to 420.76MPa and elongation comes to 16.80%.Compared with the exclusing rare earth group,7075 Al alloys′ tensile strength increased about 8.4% and elongation only falls by 2.3%, so the mechanical performance is the best.

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The Application of Rare-Earth Element

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.3005 ◽

2011 ◽

Vol 233-235 ◽

pp. 3005-3009

Author(s):

Yu Cai Wu ◽

Ming Yan

Keyword(s):

Tensile Strength ◽

Rare Earth ◽

Rare Earth Elements ◽

Rare Earth Element ◽

Earth Element ◽

Additive Process ◽

Contact Wire ◽

Specific Elongation ◽

Ag Contact ◽

The Rare Earth

In this paper, the process of Cu-Ag contact wire with adding rare-earth elements was presented. The additive process of the rare-earth elements and the function of the rare earth were chiefly analyzed. Adding the rare-earth elements into melt alloy, the oxide and sulfur can be removed from the liquid, so we can get the purified alloy. At the same time, adding rare-earth can reduce the external crack flaws which produced during the casting and makes the grain refined, as the result, the properties of the Cu-Ag alloy contact wire can be greatly improved and meliorated. Such as the conductivity, the specific elongation, tensile strength and so on, are improved.

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Effect of Compound Modification on Microstructure and Properties of High Silicon Aluminum Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.476-478.114 ◽

2012 ◽

Vol 476-478 ◽

pp. 114-117 ◽

Cited By ~ 1

Author(s):

Niu Can Liu ◽

Guang Sheng Kang ◽

Zhong Xia Liu

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Aluminum Alloy ◽

Rare Earth ◽

Eutectic Silicon ◽

Primary Silicon ◽

Unmodified Alloy ◽

Microstructure And Properties ◽

Compound Modification ◽

Double Modification

Double compound modification was carried out for hypereutectic Al-24Si alloy. The experiment showed that double modification with phosphorus and rare earth can fine the microstructure of alloy. The complex modifications of phosphorus and rare earth make the coarse block primary silicon obviously refined and the large needle eutectic silicon modified to the fine fibrous or lamella ones. The alloys with the additions of 0.10% P(phosphorus) and 0.90% RE(rare earth) have the optimal microstructure and the highest mechanical properties. Compared with the unmodified alloy, the primary silicon of alloys can be refined from 93.5μm to 24.1μm. The tensile strength is improved from 248MPa to 305MPa and the elongation is improved from 0.31% to 0.47%. Mechanism of double compound modification with phosphorus and rare earth is discussed as well.

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Effect of rare earth elements on the microstructure and properties of a die-cast aluminum alloy

Materials Testing ◽

10.3139/120.111299 ◽

2019 ◽

Vol 61 (2) ◽

pp. 159-163

Author(s):

Ruixiang Zhu ◽

Yong Su ◽

Xinyu Qin ◽

Nan Hu ◽

Liangyu Lu

Keyword(s):

Aluminum Alloy ◽

Rare Earth ◽

Rare Earth Elements ◽

Cast Aluminum Alloy ◽

Cast Aluminum ◽

Microstructure And Properties ◽

Die Cast

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Effects of La and Ce Mixed Rare Earth on Microstructure and Properties of Al-Mg-Si Aluminum Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.898.367 ◽

2017 ◽

Vol 898 ◽

pp. 367-371 ◽

Cited By ~ 3

Author(s):

Shun Cheng Wang ◽

Nan Zhou ◽

Dong Fu Song ◽

Deng Nong

Keyword(s):

Electrical Conductivity ◽

Tensile Strength ◽

Aluminum Alloy ◽

Rare Earth ◽

Eddy Current ◽

Tensile Testing ◽

Testing Machine ◽

Tensile Testing Machine ◽

Microstructure And Properties ◽

Positive Effect

The effects of La and Ce mixed rare earth on the microstructure and properties of Al-0.75Mg-0.6Si alloy were studied by optical microscopy, digital eddy current conductive instrument and tensile testing machine. Results showed that the addition of La and Ce mixed rare earth had a positive effect on the grain refinement of Al-0.75Mg-0.6Si alloy, which is beneficial to improve the electrical conductivity and strength. With increasing the additive amount of La and Ce mixed rare earth, the electrical conductivity, tensile strength and elongation of Al-0.75Mg-0.6Si alloy gradually increased. When the additive amount of La and Ce mixed rare earth increased to 0.5%, the electrical conductivity of Al-0.75Mg-0.6Si alloy was 55.7% IACS, the tensile strength and elongation of Al-0.75Mg-0.6Si alloy were 236 MPa and 16.7%, respectively. The electrical conductivity increased by 5.7%, tensile strength and elongation increased by 11.3% and 15.2% compared with that of Al-0.75Mg-0.6Si alloy without adding the La and Ce mixed rare earth.

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