Dislocation evolution and properties enhancement of GH2036 by laser shock processing: Dislocation dynamics simulation and experiment

Ren, Xudong; Zhou, Wangfan; Ren, Yunpeng; Xu, Suqiang; Liu, F.F.; Yuan, Shuxia; Ren, Na; Huang, Jinjer

doi:10.1016/j.msea.2015.12.007

Cited by 40 publications

(16 citation statements)

References 25 publications

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“…The TEM micrographs reveal a remarkably high density of dislocations. Similar observations were made by other investigators ( Ref 16,[22][23][24][25]. Ren et al (Ref 22) noted that LSP generated high-density dislocations and improved the mechanical properties of aluminum alloys.…”

Section: Resultssupporting

confidence: 84%

Effect of Laser Shock Peening on the Microstructure and Properties of the Inconel 625 Surface Layer

Rozmus-Górnikowska

Kusiński

Cieniek

2020

J. of Materi Eng and Perform

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The aim of this work was to investigate the influence of laser shock peening on the topography, microstructure, surface roughness and the mechanical properties of the Inconel 625 nickel alloy. Examination of the topography and microstructure of the nickel alloy after laser treatment was carried out by means of scanning electron microscopy as well as atomic force microscopy. The roughness of the surface was measured by WYKO NT9300 equipment. Nanohardness test was carried out using a nanoindenter NHT 50-183 of CSM Instruments equipped with a Berkovich diamond indenter. Additionally, transmission electron microscopy was used to examine the microstructural changes on the surface layer after laser treatment. The investigations showed that the laser process produced an ablation and melting of the surface layer and, hence, increased the surface roughness of the Inconel 625. On the other hand, the presence of the slip bands on the surface and on the cross section of the treated material, a high density of dislocations and a higher hardness of the treated region indicated that the laser shock processing caused severe plastic deformation of the surface layer. Additionally, due to the high plastic deformation, cracking of the carbide precipitates was observed.

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Section: Resultssupporting

confidence: 84%

Effect of Laser Shock Peening on the Microstructure and Properties of the Inconel 625 Surface Layer

Rozmus-Górnikowska

Kusiński

Cieniek

2020

J. of Materi Eng and Perform

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“…Furthermore, some obvious dislocation blocks(DBs) can be found adjacent to the grain boundary (as shown in Fig. 8e), which can be explained by the fact that the dislocation movement is hindered by grain boundary and then a large number of dislocations are piled along the grain boundary [23]. Finally, for the substrate of 316L stainless steel, the average size of the original grain in the substrate is more than 8 μm, as shown in Fig.…”

Section: Typical Tem Observations In Three Zones Of the Cladding Coatmentioning

confidence: 94%

Characterization and analyses on micro-hardness, residual stress and microstructure in laser cladding coating of 316L stainless steel subjected to massive LSP treatment

Luo

Jing

Sheng

et al. 2016

Journal of Alloys and Compounds

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The effects of massive laser shock peening (LSP) treatment on micro-hardness, residual stress and microstructure in four different zones of laser cladding coating was investigated. Furthermore, micro-hardness curves and residual stress distributions with and without massive LSP treatment were presented and compared, and typical microstructure in different zones of both coatings were characterized by transmission electron microscope (TEM)and cross-sectional optical microscope (OM) observations. Results and analyses showed that massive LSP treatment had an important influence on micro-hardness and residual stress of the cladding coating. Special attempt was made to the effects of massive LSP treatment on microstructure in three zones of the cladding coating. In addition, the underlying mechanism of massive LSP treatment on microstructure and mechanical properties of the cladding coating was revealed clearly.

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“…When Figure 4 was observed, it was seen that the dislocations were organized and these well organized dislocations created the dislocation cell walls. Ren et al [30] observed band-like dislocation walls in TEM observations which performed in LSP GH2036 and they reported that the dislocation walls coincident with slip planes. When Figure 4a and 4b were examined, the dislocation walls having tangled dislocation boundaries attracted the attention in the single LSP impacted 6061-T6 alloy and also looked band-like.…”

Section: Resultsmentioning

confidence: 97%

Effect of multiple laser shock processing on nano-scale microstructure of an aluminum alloy

GencalpIrizalp

Saklakoğlu

2018

CAN

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In this study, nano-scale microstructural evolution in 6061-T6 alloy after laser shock processing (LSP) were studied. 6061-T6 alloy plate were subjected to multiple LSP. The LSP treated area was characterized by X-ray diffraction and the microstructure of the samples was analyzed by transmission electron microscopy. Focused Ion Beam (FIB) tools were used to prepare TEM samples in precise areas. It was found that even though aluminum had high stacking fault energy, LSP yielded to formation of ultrafine grains and deformation faults such as dislocation cells, stacking faults. The stacking fault probability (PSF) was obtained in LSP-treated alloy using X-Ray diffraction. Deformation induced stacking faults lead to the peak position shifts, broadening and asymmetry of diffraction. XRD analysis and TEM observations revealed significant densities of stacking faults in LSP-treated 6061-T6 alloy. And mechanical properties of LSP-treated alloy were also determined to understand the hardening behavior with high concentration of structural defects.

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Dislocation evolution and properties enhancement of GH2036 by laser shock processing: Dislocation dynamics simulation and experiment

Cited by 40 publications

References 25 publications

Effect of Laser Shock Peening on the Microstructure and Properties of the Inconel 625 Surface Layer

Effect of Laser Shock Peening on the Microstructure and Properties of the Inconel 625 Surface Layer

Characterization and analyses on micro-hardness, residual stress and microstructure in laser cladding coating of 316L stainless steel subjected to massive LSP treatment

Effect of multiple laser shock processing on nano-scale microstructure of an aluminum alloy

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