Analysis of plastic deformation behavior of ultrafine-grained aluminum processed by the newly developed ultrasonic vibration enhanced ECAP: Simulation and experiments

The new technique of using ultrasonic vibration to break hard rock is still in the experimental stage, but it has significant potential for improving the efficiency of hard rock crushing. We have analyzed the mechanical properties of granite under ultrasonic vibration and the characteristics of the damage produced. This was achieved by using an ultraloading device to apply continuous and discontinuous ultrasonic vibrations, respectively, to 32 mm diameter and 72 mm high granite samples. An ultradynamic data acceptor combined with strain gauges was used to monitor the strain of the granite in real time, and the elastic-plastic deformation behavior of the granite under ultrasonic vibration was observed. The results of this experiment indicate that the granite samples underwent elastic deformation, plastic deformation, and damage during this process. The samples first experienced compressive deformation with no obvious rupturing. As the vibration continued, the deformation finally became tensile, and significant fragmentation occurred. The mechanical properties of granite under ultrasonic vibration are analyzed in detail on the basis of these results, and the basis for selecting a vibration frequency is discussed.

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Predicting and Characterizing Plastic Deformation Behavior of Transversely-isotropic Carbon Fiber Monofilament Using Finite Element Simulation and Nanoindentation

Fibers and Polymers ◽

10.1007/s12221-021-1081-z ◽

2021 ◽

Author(s):

Hongzhou Li ◽

Chuntai Liu ◽

Jialian Chen

Keyword(s):

Plastic Deformation ◽

Finite Element ◽

Carbon Fiber ◽

Finite Element Simulation ◽

Deformation Behavior ◽

Transversely Isotropic ◽

Element Simulation ◽

Plastic Deformation Behavior ◽

Isotropic Carbon

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Competitive effect of stacking fault energy and short-range clustering on the plastic deformation behavior of Cu-Ni alloys

Materials Science and Engineering A ◽

10.1016/j.msea.2016.10.064 ◽

2017 ◽

Vol 679 ◽

pp. 484-492 ◽

Cited By ~ 19

Author(s):

Z.Y. Wang ◽

D. Han ◽

X.W. Li

Keyword(s):

Plastic Deformation ◽

Deformation Behavior ◽

Short Range ◽

Stacking Fault ◽

Stacking Fault Energy ◽

Competitive Effect ◽

Ni Alloys ◽

Plastic Deformation Behavior

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Effect of Grain Size on Deformation Twinning Behavior of Ti6Al4V Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.830-831.337 ◽

2015 ◽

Vol 830-831 ◽

pp. 337-340

Author(s):

Ashish Kumar Saxena ◽

Manikanta Anupoju ◽

Asim Tewari ◽

Prita Pant

Keyword(s):

Plastic Deformation ◽

Grain Size ◽

Strain Rate ◽

Deformation Behavior ◽

Deformation Behaviour ◽

Air Cooling ◽

Specific Strength ◽

Aerospace Applications ◽

Β Phase ◽

Plastic Deformation Behavior

An understanding of the plastic deformation behavior of Ti6Al4V (Ti64) is of great interest because it is used in aerospace applications due to its high specific strength. In addition, Ti alloys have limited slip systems due to hexagonal crystal structure; hence twinning plays an important role in plastic deformation. The present work focuses upon the grain size effect on plastic deformation behaviour of Ti64. Various microstructures with different grain size were developed via annealing of Ti64 alloy in α-β phase regime (825°C and 850°C) for 4 hours followed by air cooling. The deformation behavior of these samples was investigated at various deformation temperature and strain rate conditions. Detailed microstructure studies showed that (i) smaller grains undergoes twinning only at low temperature and high strain rate, (ii) large grain samples undergo twinning at all temperatures & strain rates, though the extent of twinning varied.

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Investigations on Microstructure Evolution and Deformation Behavior of Aged and Ultrafine Grained Al-Zn-Mg Alloy Subjected to Severe Plastic Deformation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.667-669.253 ◽

2010 ◽

Vol 667-669 ◽

pp. 253-258

Author(s):

Wei Ping Hu ◽

Si Yuan Zhang ◽

Xiao Yu He ◽

Zhen Yang Liu ◽

Rolf Berghammer ◽

...

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Plastic Deformation ◽

Grain Size ◽

Severe Plastic Deformation ◽

Microstructure Evolution ◽

Deformation Behavior ◽

Deformation Mechanisms ◽

Mg Alloy ◽

Ultrafine Grained

An aged Al-5Zn-1.6Mg alloy with fine η' precipitates was grain refined to ~100 nm grain size by severe plastic deformation (SPD). Microstructure evolution during SPD and mechanical behaviour after SPD of the alloy were characterized by electron microscopy and tensile, compression as well as nanoindentation tests. The influence of η' precipitates on microstructure and mechanical properties of ultrafine grained Al-Zn-Mg alloy is discussed with respect to their effect on dislocation configurations and deformation mechanisms during processing of the alloy.

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