Effect of process parameters on microstructure and mechanical properties in AlSi9Mg connecting-rod fabricated by semi-solid squeeze casting

Mg-Zn-Y alloys containing a thermally stable icosahedral quasicrystal phase (I-phase) will have wide application future on condition that primary α-Mg dendrite and the I-phase can be refined during the casting process. In this research, the microstructure and mechanical properties of the rheo-squeeze casting (RSC) Mg-6Zn-1.4Y alloys have been investigated. The Mg alloy melt was exposed to ultrasonic vibration (USV) with different acoustic power densities from 0 W/mL to 9 W/mL, and then the slurry was formed by squeeze casting. The results show that good semi-solid slurry with fine and spherical α-Mg particles could be obtained with the acoustic power density of 6 W/mL, and the average grain size and shape factor of primary α-Mg were 32 μm and 0.76, respectively. Meanwhile the coarse eutectic I-phase (Mg3Zn6Y) was refined obviously and dispersed uniformly. Compared with the samples without USV, the tensile strength and elongation of the RSC casting samples with 6 W/mL acoustic power density were elevated by 10.6% and 55.5%, respectively.

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Microstructures and mechanical properties of semi-solid squeeze casting ZL104 connecting rod

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(18)64656-4 ◽

2018 ◽

Vol 28 (2) ◽

pp. 235-243 ◽

Cited By ~ 9

Author(s):

Yong-fei WANG ◽

Sheng-dun ZHAO ◽

Chen-yang ZHANG

Keyword(s):

Mechanical Properties ◽

Squeeze Casting ◽

Connecting Rod ◽

Microstructures And Mechanical Properties ◽

Semi Solid

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Evolution of Microstructure and Mechanical Properties of Semi-Solid Squeeze Cast A356.2 Aluminum Alloy during Heat Treatment

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.285.139 ◽

2019 ◽

Vol 285 ◽

pp. 139-145

Author(s):

Le Cheng ◽

Hong Xing Lu ◽

Qiang Zhu ◽

Xiang Kai Zhang ◽

Ai Di Shen ◽

...

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Squeeze Casting ◽

Low Cost ◽

A356 Alloy ◽

Microstructure And Mechanical Properties ◽

New Processing ◽

Semi Solid ◽

Evolution Of Microstructure ◽

Cast Condition

Semi-solid squeeze casting (SS-SC) is a new processing technology which combines semi-solid processing (SSP) and squeeze casting (SC). In this process, semi-solid slurry fills mold by using its rheological property and solidifies under high pressure. It has several advantages, such as stable filling, small heat impact to the mold, low cost, high density and excellent mechanical properties of castings, which receives more and more attention. The microstructure of castings provided by SS-SC is quite different from that of casting provided by conventional SC in as-cast condition, which leads to differences in the evolution of microstructure and mechanical properties in heat treatment process. In this study, A356.2 aluminum alloys castings were provided by both SS-SC and conventional SC respectively. The evolution of microstructure and mechanical properties of castings during heat treatment was investigated to obtain the best mechanical properties of semi-solid squeeze castings. Keywords:Microstructure, Mechanical properties, Heat treatment, A356 alloy, Semi-Solid Squeeze Casting

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Microstructure and Mechanical Properties of Squeeze Cast Semi-Solid Materials

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.192-193.257 ◽

2012 ◽

Vol 192-193 ◽

pp. 257-260 ◽

Cited By ~ 1

Author(s):

Hong Min Guo ◽

Xiang Jie Yang ◽

Shu Guo Zhang ◽

Lei Luo

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Ultimate Tensile Strength ◽

Squeeze Casting ◽

Solid Materials ◽

Angular Oscillation ◽

Squeeze Cast ◽

Microstructure And Mechanical Properties ◽

The World ◽

Semi Solid

Several rheocasting processes have been developed or applied in the world. One of the new rheocasting processes is the limited angular oscillation (LAO), in which the molten metal is rapidly cooled and slightly mixed during initial stages of solidification. Squeeze casting (SQC) using semi-solid slurry produced by LAO (Rheo-SQC) has been developed. Microstructure and mechanical properties of squeeze cast semi-solid slurries have been investigated. Complete parts with little defects have been produced. The ultimate tensile strength and elongation of semi-solid cast samples are higher than those of the liquid cast samples. It can be concluded that the rheo-SQC is a feasible process.

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