Effects of high Zn content on the microstructure and mechanical properties of Al–Zn–Cu gravity-cast alloys

2017 ◽  
Vol 679 ◽  
pp. 340-349 ◽  
Author(s):  
Sang-Soo Shin ◽  
Kyung-Mook Lim ◽  
Ik-Min Park
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Zn Content ◽  
Cast Alloys ◽  
Gravity Cast

scholarly journals Effect of Zn Content on the Microstructure and Mechanical Properties of Mg–Al–Sn–Mn Alloys

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3102
Author(s):  
Tianshuo Zhao ◽  
Yaobo Hu ◽  
Fusheng Pan ◽  
Bing He ◽  
Maosheng Guan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Dendritic Structure ◽  
Second Phase ◽  
Microstructure And Mechanical Properties ◽  
Zn Content ◽  
Dislocation Movement ◽  
Cast Alloys ◽  
Complete Recrystallization ◽  
Second Phases

High performance Mg–6Al–3Sn–0.25Mn–xZn alloys (x = 0, 0.5, 1.0, 1.5, and 2.0 wt %) without rare earth were designed. The effects of different Zn contents on the microstructure and mechanical properties were systematically investigated. The addition of Zn obviously refines the as-cast alloys dendritic structure because of the increase in the number in the second phase. For the as-extruded alloys, an appropriate amount of Zn promotes complete recrystallization, thus increasing the grain size. As the Zn content increases, the texture gradually evolves into a typical strong basal texture, which means that the basal slip is difficult to initiate. Meanwhile, the addition of Zn promotes the precipitation of small-sized second phases, which can hinder the dislocation movement. The combination of texture strengthening and precipitation strengthening is the main reason for the improvement of alloys’ strength.

Effect of Mg and Cu Additions on Microstructure and Mechanical Properties of Squeeze Casting Al-Si-Cu-Mg Alloy

2016 ◽  
Vol 850 ◽  
pp. 511-518 ◽  
Author(s):  
Hai Jun Liu ◽  
Lie Jun Li ◽  
Jian Wei Niu ◽  
Ji Xiang Gao ◽  
Chuan Dong Ren
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Artificial Aging ◽  
Squeeze Casting ◽  
Solution Treatment ◽  
Mg Alloys ◽  
Percentage Elongation ◽  
Microstructure And Mechanical Properties ◽  
Content Ratio ◽  
Cast Alloys

The effects of Mg and Cu additions with different contents on the mechanical properties of Al-Si alloy prepared by indirect squeeze casting have been experimentally investigated. The microstructure and mechanical properties of as-cast and T6-treated Al-Si-Cu-Mg alloys were tested by OM, SEM, DSC and tensile measurement, where the samples were produced by artificial aging at 180°C for 8 h after solution treatment at 540°C for 4 h. It has been found that for the as-cast alloys, with increasing contents of Mg and Cu the tensile strength (UTS) and yield strength (YS) increased, while the percentage elongation (El) decreased. And the optimal mechanical properties of Al-Si-Cu-Mg alloys were obtained under the content ratio of Cu/Mg within 4, where the UTS and El reached 426 MPa and 6.3% after T6 treated, respectively.

Ultrasonic Rheocasting for Refinement of Mg Alloys Reinforced with LPSO Phase

2018 ◽  
Vol 941 ◽  
pp. 1607-1612 ◽  
Author(s):  
Shu Lin Lü ◽  
Xiong Yang ◽  
Liang Yan Hao ◽  
Shu Sen Wu
Keyword(s):  
Mechanical Properties ◽  
Squeeze Casting ◽  
Mg Alloys ◽  
Average Thickness ◽  
Squeeze Pressure ◽  
Lpso Phase ◽  
Long Period ◽  
Lpso Structure ◽  
Cast Alloys ◽  
Gravity Cast

In this work, ultrasonic rheocasting was used to refine the microstructures of Mg alloys reinforced with long period stacking ordered (LPSO) phase. The semisolid slurries of Mg-Zn-Y and Mg-Ni-Y alloys were prepared by ultrasonic vibration (UV) and then formed by rheo-squeeze casting under high squeeze pressure (~ 400 MPa). The effects of UV and squeeze pressure on microstructure and mechanical properties of the Mg alloys were studied. The results reveal that UV and rheo-squeeze casting can significantly refine the LPSO structure and alpha-Mg matrix in Mg alloys, but they cannot change the phase compositions of the alloys or the type of LPSO phase. When the squeeze pressure is 400 MPa, the average thickness of LPSO phase is decreased, and the block LPSO structure is completed eliminated and uniformly distributed at the grain boundaries. Compared with the gravity cast alloys without UV, mechanical properties of the rheocast Mg alloys were enhanced and reached the maximums when the squeeze pressure was 400 MPa.

Effect of Magnesium and Artificial Aging on the Microstructure and Mechanical Properties of Al-Si-Mn-Mg Alloys

2009 ◽  
Vol 83-86 ◽  
pp. 415-420
Author(s):  
S.G. Shabestari ◽  
M.M. Hejazi ◽  
M. Bahramifar
Keyword(s):  
Mechanical Properties ◽  
Quality Index ◽  
Industrial Applications ◽  
Maximum Value ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Cast Alloys ◽  
Mg Addition ◽  
Strength And Ductility ◽  
Magnesium Addition

The effect of magnesium addition up to 0.9 wt.% on the microstructure and mechanical properties of Al-9Si-0.35Mn alloy has been investigated in both as-cast and heat treated conditions. Generally, Mg addition increases the heat treatability and strength of the alloys at the expense of the lower ductility. High levels of magnesium addition, causes the formation of large and brittle intermetallics, a slight increase in porosity and hence, a decrease in ultimate tensile strength and ductility of the cast alloys. T6 heat treatment increases the strength of the alloys up to 80 percent compared to as-cast samples. Among the studied compositions, heat treated Al-9Si-0.35Mn-0.25Mg alloy, has the maximum value of quality index and can be regarded as a promising material with the optimum mechanical properties for industrial applications.

scholarly journals Microstructure and Mechanical Properties of Ti-B-N Cast Alloys Prepared by Reactive Arc-Melting

2002 ◽  
Vol 43 (9) ◽  
pp. 2193-2196 ◽  
Author(s):  
Dai Morikawa ◽  
Janakarajan Ramkumar ◽  
Hiroshi Mabuchi ◽  
Hiroshi Tsuda ◽  
Toshiyuki Matsui ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Arc Melting ◽  
Microstructure And Mechanical Properties ◽  
Cast Alloys

Effect of Zn Content on Microstructure and Mechanical Properties of MgZnYLaMM Alloys

2012 ◽  
Vol 43 (11) ◽  
pp. 4383-4396 ◽  
Author(s):  
Pablo Pérez ◽  
Gerardo Garcés ◽  
Maria Maeso ◽  
Paloma Adeva
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Zn Content
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