Microscopic residual stress evolution at the SiC/Al interface during nanoindentation via molecular dynamics simulation

Liu, Yuxin; Wang, Qingping; Lu, Chunyang; Xue, Tingting; Hu, Biao; Zhang, Chao

doi:10.1016/j.surfin.2022.102210

Cited by 12 publications

(2 citation statements)

References 46 publications

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“…In figure 9(a4), Some atoms in the upper half of the γ-phase undergo further plastic flow in the [100] direction under the action of the grinding ball; some atoms of its lower half move to the phase boundary due to the discontinuity of the lattice, some atoms of the lower half will be hindered to rebound and meet with some atoms of the upper half, which makes the tendency of the upper atoms to move more obvious. As shown in figures 9(a4), (b4) due to the significant plastic flow of the workpiece atoms [41]. This releases the stress accumulated by the grinding ball in the workpiece, and the number of displaced atoms around the grinding ball decreases.…”

Section: Study Of the Depth Of Abrasion Marks Mechanical Properties A...mentioning

confidence: 91%

Compression and fretting wear studies of γ/α ₂ duplex TiAl alloys at the nanoscale

Zheng,

Han,

et al. 2024

Phys. Scr.

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The nanofabrication behavior of γ/α2 duplex TiAl alloys by downward pressure followed by reciprocating friction with investigating diamond grinding balls via MD simulation. It was found that a certain number of dislocations in the workpiece was low and the resilience was high during the initial pressing stage, and the number of dislocations increased, the resilience decreased and the plastic deformation capacity was enhanced under continuous pressing. The α2 phase did not deform significantly during the compression process. The presence of the α2 phase increases the overall hardness of the material, and elastic-plastic deformation occurs mainly where the γ phase is present， The endowment layer dislocations generated during the intrinsic stacking fault rebound via the phase boundary to form V-shaped dislocations. During the reciprocating friction of the workpiece, forward friction produces Vshaped dislocations, and reverse friction makes the dislocations disappear. This process results in the forward average friction force being greater than the reverse average friction force. γ/α2 phase boundary has an impeding effect on the downward proliferation of defects, and the existence of the phase boundary makes the temperature transfer appear discontinuous. During friction, the certain number of vacancy atoms in the γ-phase increases and the transition between FCC and HCP occurs.

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Section: Study Of the Depth Of Abrasion Marks Mechanical Properties A...mentioning

confidence: 91%

Compression and fretting wear studies of γ/α ₂ duplex TiAl alloys at the nanoscale

Zheng,

Han,

et al. 2024

Phys. Scr.

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“…This opened up new possibilities in the field of indentation techniques. With the continuous advancement of technology, there is a growing demand for understanding the mechanical properties of materials, such as hardness [3][4][5][6][7], Young's modulus [8][9][10][11][12], residual stress [13][14][15][16][17], and plasticity [18][19][20][21][22]. These studies have demonstrated that the mechanical properties of materials can be extracted by comparing the load-displacement curves obtained from finite element simulations with those obtained from experimental measurements when the data are in good agreement.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Mechanical Properties of Aluminum Alloy Based on Indentation Curve and Projection Area of Contact Zone

Bai,

Liu

2024

Metals

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This study proposes a method for determining aluminum alloys’ yield stress and hardening index based on indentation experiments and finite element simulations. Firstly, the dimensionless analysis of indentation variables was performed on three different aluminum alloys using the same maximum indentation depth to obtain load-displacement curves. Then, laser confocal microscopy was used to observe the residual indentation morphology. And four dimensionless parameters were derived from the load-displacement curves while another dimensionless parameter was obtained from the projection area of the contact zone. Subsequently, a genetic algorithm was employed to solve these five dimensionless parameters and estimate the yield stress and hardening index. Finally, the predicted results are compared with uniaxial tensile experiments and the results obtained are essentially the same. The yield stress and hardening index can be predicted using this method. And an example is used to verify that this method enables predictions for unidentified “mysterious material” and the expected results agree with the experiments.

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Wear mechanism in nano polishing of SiCp/Al composite materials using molecular dynamics

Zhang,

Wu,

Wang

et al. 2024

Int J Adv Manuf Technol

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Microscopic residual stress evolution at the SiC/Al interface during nanoindentation via molecular dynamics simulation

Cited by 12 publications

References 46 publications

Compression and fretting wear studies of γ/α ₂ duplex TiAl alloys at the nanoscale

Compression and fretting wear studies of γ/α ₂ duplex TiAl alloys at the nanoscale

Estimation of Mechanical Properties of Aluminum Alloy Based on Indentation Curve and Projection Area of Contact Zone

Wear mechanism in nano polishing of SiCp/Al composite materials using molecular dynamics

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Microscopic residual stress evolution at the SiC/Al interface during nanoindentation via molecular dynamics simulation

Cited by 12 publications

References 46 publications

Compression and fretting wear studies of γ/α 2 duplex TiAl alloys at the nanoscale

Compression and fretting wear studies of γ/α 2 duplex TiAl alloys at the nanoscale

Estimation of Mechanical Properties of Aluminum Alloy Based on Indentation Curve and Projection Area of Contact Zone

Wear mechanism in nano polishing of SiCp/Al composite materials using molecular dynamics

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Product

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Compression and fretting wear studies of γ/α ₂ duplex TiAl alloys at the nanoscale

Compression and fretting wear studies of γ/α ₂ duplex TiAl alloys at the nanoscale