Improving embrittlement in the Ti-Al-C MAX phase system: A composite approach for surface severe plastic deformation

Heinzelmeier, Adrien; Guitton, Antoine; Novelli, Marc; Yu, Wenbo; Grosdidier, Thierry

doi:10.1016/j.jallcom.2023.169946

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…Due to the plastic deformation capacity of metals and the resulted deformation gradient (strain hardening, compressive residual stress, +), these techniques are usually applied on metallic materials but can also be used on ceramics 5,34) or composites. 35) They can be easily implemented at an industrial scale, can be automatized 36,37) and produce a small amount of waste in comparison to thermochemical surface processes. The affected depth depends on the contribution of all the treatment parameters (shot and material initial hardness, temperature, duration +) -as will be detailed in section 3and the gradient can be produced, both in terms of microstructure and residual stresses, along several tens to some hundreds of microns depending on the material and the exact processing parameters.…”

Section: Shot Peening and Derived Techniques Of Surfacementioning

confidence: 99%

Surface Severe Plastic Deformation for Improved Mechanical/Corrosion Properties and Further Applications in the Bio-Medical and Hydrogen Sectors

2023

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Various techniques enabling surface severe plastic deformation (SSPD) have been developed or optimised over the past years. This manuscript presents a broad overview of recent developments in the field of SSPD and its application that take advantages of having a deformed gradient surface with both (i) higher strength and (ii) an improved "reactivity". First, the principle and technological advantages/ disadvantages of several SSPD technologies, involving either guided or non-directional mechanical impacts, are recalled. Then, after a short recall on the nature of the structure the modified surface formed under SSPD, the effects of the processing parameters and temperature of deformation on the surface roughness and subsurface microstructure modifications are illustrated with a particular emphasis on the surface mechanical attrition treatment (SMAT) and ultrasonic shot peening (USP) techniques deriving from the traditional pre-strain shot peening. The effect of these surface and sub-surface modifications on the mechanical properties, and in particular the fatigue response, are recalled with a special emphasis on the surface integrity and potential over shot peening. Then, the manuscript concentrates on the effect of the surface enhanced diffusion of chemical species induced by the presence of structural defects to modify the corrosion behaviour and enhance the potential assisted SSPD + thermo-chemically "duplex" treatments. In these cases, in addition to induce grain refinement and dislocations, the importance of controlling some potential surface contamination is stressed. Finally, the manuscript terminates by illustrating some new research studies on potential applications for the challenges in the hydrogen sector for its solid-state storage and the protection of mechanical infrastructures as well as for bio-medical applications with biocompatible Ti-based alloys and biodegradable Mg-based ones.

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Section: Shot Peening and Derived Techniques Of Surfacementioning

confidence: 99%

Surface Severe Plastic Deformation for Improved Mechanical/Corrosion Properties and Further Applications in the Bio-Medical and Hydrogen Sectors

2023

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“…Copper alloys have been extensively employed in the production of industrial products and engineering fields, such as aerospace, communications, etc., due to their many advantages, including strong electrical conductivity, good plastic molding, superior wear resistance, and corrosion resistance, but their low strength limits their application. However, it is commonly known that there is high strength [1,2] but limited ductility in nano-grained (NG) and ultrafine-grained (UFG) materials which are prepared via severe plastic deformation (SPD) [3,4] methods. The main reason for the limited ductility of nanostructured and UFG-structured materials is the low strain-hardening capability which is caused by the small grain size and the inability of dislocations to accumulate [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effects of SMAT Temperature and Stacking Fault Energy on the Mechanical Properties and Microstructure Evolution of Cu-Al-Zn Alloys

Zhou,

Gong,

Sun

et al. 2023

Metals

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Alloys with a gradient structure (GS) exhibit a superior combination of strength and ductility. However, the effects of treatment temperature and stacking fault energy on the tensile behavior and microstructure evolution of GS alloys have not been systematically investigated. In this study, GS Cu-Al-Zn alloys with different stacking fault energy (SFE, 40/7 mJ/m2) were prepared using surface mechanical attrition treatment (SMAT) at cryogenic and room temperature, respectively. The microstructure results indicate that more stacking faults and deformation twins were activated in the SFE-7 alloys at cryogenic temperature, which led to higher strength compared to that of the alloys SMAT-ed at room temperature. In addition, it was found that the yield strength and hetero-deformation-induced (HDI) stress of the SFE-7 alloy were significantly higher than those of the SFE-40 alloy, resulting in a good combination of strength and ductility. Furthermore, more dispersed strain bands were observed in the SFE-7 sample during whole tensile deformation, which contributes to higher ductility.

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Study on microstructure evolution, mechanical properties and deformation mechanism of Ti-6Al-4V alloy by hydraulic tension on-line warm rolling

Zhu,

Lan,

Lin

et al. 2023

Journal of Alloys and Compounds

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Improving embrittlement in the Ti-Al-C MAX phase system: A composite approach for surface severe plastic deformation

Cited by 8 publications

References 36 publications

Surface Severe Plastic Deformation for Improved Mechanical/Corrosion Properties and Further Applications in the Bio-Medical and Hydrogen Sectors

Surface Severe Plastic Deformation for Improved Mechanical/Corrosion Properties and Further Applications in the Bio-Medical and Hydrogen Sectors

Effects of SMAT Temperature and Stacking Fault Energy on the Mechanical Properties and Microstructure Evolution of Cu-Al-Zn Alloys

Study on microstructure evolution, mechanical properties and deformation mechanism of Ti-6Al-4V alloy by hydraulic tension on-line warm rolling

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