Hall-Petch relations and strengthening of Al-ZnO composites in view of grain size relative to interparticle spacing

Li, Cheng Lin; Mei, Q.S.; Li, J.Y.; Chen, F.; Ma, Ye; Mei, X.M.

doi:10.1016/j.scriptamat.2018.04.042

Cited by 95 publications

(25 citation statements)

References 27 publications

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“…Under the condition, mechanical strengthening of fine grain for sample became more pronounced. Hall-Petch formula [30,31] describes the strengthening principle as:…”

Section: Mechanical Enhancement Of Caco 3 Particlesmentioning

confidence: 99%

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Wang

2020

Mater. Res. Express

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Incorporation of different fine grain calcium carbonate into CaCO 3 /low-density unsaturated polyester resin (LDUPR) composites was studied and evident mechanical enhancement of CaCO 3 on composites was investigated. Preliminary experiment results indicated that proper content of CaCO 3 was less than 30.00 phr (parts per hundreds of resin), suitable preparation temperature range was from 72.0°C to 80.0°C, and initiator content was 1.80 phr. Optimal preparation conditions of CaCO 3 /LDUPR samples were obtained with the presence of 25.00 phr CaCO 3 and 2.50 phr NH 4 HCO 3 at 76.0°C based on preliminary experiments. The lowest apparent density of A-CaCO 3 /LDUPR composite was 0.53±0.02 g·cm −3 with a compressive strength of 20.27±0.51 MPa·g −1 ·cm 3 , and the highest specific compressive strength of the sample was 38.25±1.43 MPa·g −1 ·cm 3 . It is attributed to the hindrance to cross-linking between unsaturated polyester and styrene, and to the decrease of exothermic heat of the polymerization, which was caused by the existence of CaCO 3 . Unusual matrix microstructure with regular ripples and dimples formed by CaCO 3 , and the particular mechanical enhancement of regular ripples and dimples in composites were explored. 'CaCO 3 reefs' concept, reefs-induced ripples, dimples of streams flowing, and resolution of external force with major force further being consumed models comprised the regulated mechanical enhancement of CaCO 3 in CaCO 3 /LDUPR composites. This particular polymerization retarding and mechanical strengthening were obvious for the finest grain CaCO

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“…Under the condition, mechanical strengthening of fine grain for sample became more pronounced. Hall-Petch formula [30,31] describes the strengthening principle as:…”

Section: Mechanical Enhancement Of Caco 3 Particlesmentioning

confidence: 99%

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Wang

2020

Mater. Res. Express

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“…Based on the classical concepts of mechanics and solid-state physics, the deformation and fracture of crystalline solids are the main phenomena that determine the behavior of materials under loads. The strain resistance of metallic materials in the solid state can be increased by using an alloy structure refinement [2,3]. In practice, the best-known methods for obtaining a fine-grained microstructure of cast aluminum alloys are (1) melt treatment using external fields (vibration [4][5][6], ultrasound [7,8], and electromagnetic stirring [9,10]); and (2) the use of grain refining master alloys [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Influence of Vibration Treatment and Modification of A356 Aluminum Alloy on Its Structure and Mechanical Properties

Promakhov

Khmeleva

Zhukov

et al. 2019

Metals

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A series of casting experiments was conducted with A356 aluminum alloys by applying vibration treatment and using Al-TiB2 composite master alloys. The main vibration effects include the promotion of nucleation and a reduction in as-cast grain size. Using composite master alloys with titanium diboride microparticles allows further reduction in the average grain size to 140 µm. The reasons for this behavior are discussed in terms of the complex effect on the melt, considering the destruction of dendrites, and the presence of additional crystallization centers. Tensile tests were performed on the samples obtained during the vibration treatment and with titanium diboride particles. The tensile strength increased from 182 to 227 MPa after the vibration treatment for the alloys containing titanium diboride.

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“…The instantaneous temperature rise of the copper sheet increases during rolling, causing an increase in the average grain size of the metal copper (As shown in figures 2(a)-(c)). The microhardness and grain size of the metal generally meet the hall-petch formula [16,17]:…”

Section: Effect Of Deformation Rate On Micro-hardness Under Differentmentioning

confidence: 99%

10 Effect of pulse current on micro-hardness and wear performance of cold-rolled T2 copper sheet

Song

Wei

Mu³

et al. 2020

Mater. Res. Express

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The effect of pulse current assisted rolling on the micro-hardness and wear properties of T2 copper sheet was studied. The micro-hardness of copper sheet with pulse current assisted rolling was measured, and the hardness values of the copper sheet at different deformation rates were obtained. The wear performance of rolled copper sheet was tested by friction and wear tester. The results show that compared with traditional cold rolling, with the increase of deformation rate, the micro-hardness of copper sheet with pulse current assisted rolling increased after an initial decrease. The microhardness reaches the minimum value((82.25±2.5)HV0.1) when the rolling deformation rate reaches 65%. The specific wear rate of the copper sheet reached the maximum(0.00176 mm 3 /N·m) when the deformation rate of the copper sheet was 65%. The copper sheet has a smaller specific wear rate by using pulse current assisted rolling, and the oxygen element of the wear debris has a lower content. This indicates that pulse current assisted rolling can improve the wear resistance and oxidation resistance of copper sheet.

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Hall-Petch relations and strengthening of Al-ZnO composites in view of grain size relative to interparticle spacing

Cited by 95 publications

References 27 publications

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Influence of Vibration Treatment and Modification of A356 Aluminum Alloy on Its Structure and Mechanical Properties

10 Effect of pulse current on micro-hardness and wear performance of cold-rolled T2 copper sheet

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Hall-Petch relations and strengthening of Al-ZnO composites in view of grain size relative to interparticle spacing

Cited by 95 publications

References 27 publications

Mechanical enhancement of ripples and dimples in CaCO3/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO3/low-density unsaturated polyester resin composites

Influence of Vibration Treatment and Modification of A356 Aluminum Alloy on Its Structure and Mechanical Properties

10 Effect of pulse current on micro-hardness and wear performance of cold-rolled T2 copper sheet

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Product

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Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites

Mechanical enhancement of ripples and dimples in CaCO₃/low-density unsaturated polyester resin composites