Effects of Sm and Zr Addition on the Microstructure and Mechanical Properties in Mg-Cu Alloys

2017 ◽  
Vol 727 ◽  
pp. 88-92
Author(s):  
Zhi Chao Xu ◽  
Zhong Xue Feng ◽  
Jia Liang Dong
Keyword(s):  
Mechanical Properties ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Zr Addition ◽  
Microstructure And Mechanical Properties ◽  
Zr Alloys

The effects of Sm and Zr amount on the properties of Mg-Cu-Sm-Zr alloys were systematically investigated. The results showed that the Mg99Cu alloy consist of-Mg matrix and Mg2Cu phase. After the addition of Sm and Zr, it was confirmed that Sm and Zr change the structure and distribution of Mg2Cu phase. In the meantime, the CuZr2 and CuSm phases which make a major contribution to mechanical properties were observed in the Mg-Cu-Sm-Zr alloys. The addition of Sm and Zr can also greatly refine the grains. The strength continuously increased due to the increase of Sm and Zr content. The elongation first increased within the range of 0-1.5%Sm 0-0.9%Zr, and the decreased. The alloys with 0.5wt%Sm and 1.9wt%Zr had the best combination of mechanical properties.

Effect of Zr Addition and Heat Treatment on Microstructure and Mechanical Properties of Suction Cast Al-Si-Cu Alloys

2021 ◽  
Author(s):  
Sukla Mondol ◽  
Ujjval Bansal ◽  
Mahander Pratap Singh ◽  
Saurabh Dixit ◽  
Animesh Mandal ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cu Alloys ◽  
Zr Addition ◽  
Microstructure And Mechanical Properties

Effect of the Cyclic Extrusion and Compression Processing on Microstructure and Mechanical Properties of Al-1%Cu Alloy

2018 ◽  
Vol 780 ◽  
pp. 93-97
Author(s):  
Walaa Abdelaziem ◽  
Atef Hamada ◽  
Mohsen Abdel-Naeim Hassan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Cast Alloy ◽  
Surface Hardness ◽  
Grain Structure ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Microstructure And Mechanical Properties ◽  
Elongation To Failure

The Simple Cyclic extrusion compression (SCEC) has been developed for producing Al-1%Cu alloys with fine microstructures and superior properties. SCEC method was applied for only two-passess.It was found that the grain structure was significantly reduced from 1500 μm to 100 μm after two passes of cyclic extrusion. The ultimate tensile strength and elongation to failure of as-cast alloy were 110 MPa and 12 %, respectively. However, the corresponding mechanical properties of the two pass CEC deformed alloy are 275 MPa and 35%, respectively. These findings ensure that a significant improvement in the grain structure has been achieved. In addition, cyclic extrusion deformation increased the surface hardness of the alloy by 50 % after two passes.

Effect of Alloying Elements on the Strength and Casting Characteristics of High Strength Al-Zn-Mg-Cu Alloys

2005 ◽  
Vol 475-479 ◽  
pp. 2539-2542 ◽  
Author(s):  
Ki Tae Kim ◽  
Jeong Min Kim ◽  
Ki Dug Sung ◽  
Joong Hwan Jun ◽  
Woon Jae Jung
Keyword(s):  
Mechanical Properties ◽  
Base Alloy ◽  
High Strength ◽  
Hot Tearing ◽  
Alloying Elements ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Zr Addition ◽  
Tearing Resistance ◽  
Mgzn2 Phase

Small amounts of various alloying elements were added to a high strength Al-Zn-Mg-Cu alloy and their effects on the microstructure, mechanical properties, and casting characteristics were investigated. Silicon additions with or without extra Mg to the Al-Zn-Mg-Cu alloy could enhance the castability such as fluidity, feedability, and hot tearing resistance significantly while maintaining a high strength. However, in these alloys containing silicon the compositional adjustment was necessary to prevent the Mg2Si phase formation from degrading the precipitation of MgZn2 phase that is responsible for the high strength. Zr addition to the base alloy was also observed to improve the feedability without deteriorating the tensile strength.

scholarly journals Effects of Excessive Zr Content and Ultrasonic Treatment on Microstructure and Mechanical Properties of Al-Zn-Mg-Cu Alloy

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 632
Author(s):  
Cheng Li ◽  
Shusen Wu ◽  
Shulin Lü ◽  
Jianyu Li ◽  
Longfei Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Ultrasonic Vibration ◽  
Ultrasonic Treatment ◽  
Second Phase ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Microstructure And Mechanical Properties ◽  
Second Phase Particles ◽  
Properties Of Materials

The Zr element is one of the important grain refiners for 7xxx series Al-Zn-Mg-Cu alloys, but the effect of Zr content more than 0.15 wt.% needs to be deeply investigated under the action of ultrasonic vibration. In this study, the effects of Zr contents (0.1 to 0.25 wt.%) on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy were studied. The results showed that Zr element could refine grains, but when the Zr content was greater than 0.15 wt.%, the grain size was not uniform, the number of second phase particles increased, and the segregation of components became more serious. It was found that after ultrasonic treatment, the grain-size inhomogeneity was greatly improved, and the Zr content could be added up to 0.2 wt.%. When the Zr content is equal or lower than 0.2 wt.%, ultrasonic treatment can effectively improve the mechanical properties of materials by refining grains and weakening segregation. However, when the Zr content is up to 0.25 wt.%, the effect is getting worse.

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