Microstructure and residual stresses in surface layer of simultaneously laser alloyed and burnished steel

Radziejewska, Joanna; Skrzypek, Sławomira

doi:10.1016/j.jmatprotec.2008.04.067

Cited by 18 publications

(9 citation statements)

References 13 publications

(14 reference statements)

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“…Grain refinement due to SPD‐induced DRX is determined by the combined effects of strain, strain rate, and temperature during processing 31, 58. In addition to grain size changes, the processing temperature is known to be a critical factor for the residual stress generation59, 60 and the occurrence of phase transformation of the processed materials 61…”

Section: Resultsmentioning

confidence: 99%

Effect of cryogenic burnishing on surface integrity modifications of Co‐Cr‐Mo biomedical alloy

et al. 2012

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Severe plastic deformation (SPD) processes have been used to modify the surface integrity properties of many materials by generating ultrafine or even nanometer-sized grains in the surface and subsurface region. These fine grained materials created by SPD and dynamic recrystallization in a thin layer near the surface usually have higher hardness and frequently exhibit enhanced mechanical properties (wear resistance, corrosion resistance, fatigue life, etc.). Cryogenic burnishing, a SPD process, was used to improve several surface integrity parameters of a Co-Cr-Mo biomedical alloy. Application of liquid nitrogen during the burnishing process significantly suppressed the temperature rise within and outside the nitrogen application zone. Better surface finish, high hardness value, thick burnishing-influenced surface layer, and significant grain refinement were simultaneously achieved with the application of cryogenic cooling. Current results show that cryogenic burnishing can be an effective processing method for modifying the studied surface integrity properties of Co-Cr-Mo biomedical alloy.

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Section: Resultsmentioning

confidence: 99%

Effect of cryogenic burnishing on surface integrity modifications of Co‐Cr‐Mo biomedical alloy

et al. 2012

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“…There is a need for non-destructive analysis of the surface layer quality after complicated processes of surface treatment, especially the plastic surface treatment, in particular in high volume production environments or storage. Treatment consisting of cold work deformation of the surface introduces compressive stresses which, as confirmed by numerous, independently carried out research of national and international centers [14,[23][24][25], have a very beneficial effect on the performance of products. The level of stress and a way of their distribution may, however, be subjected to significant changes due to the existence of variable, random conditions of the manufacturing process, giving a large scatter of the performance of products.…”

Section: Resultsmentioning

confidence: 98%

New Indicators Of Burnished Surface Evaluation – Reasons Of Application

Toboła

Rusek

Czechowski

et al. 2015

Metrology and Measurement Systems

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Modern production technology requires new ways of surface examination and a special kind of surface profile parameters. Industrial quality inspection needs to be fast, reliable and inexpensive. In this paper it is shown how stochastic surface examination and its proper parameters could be a solution for many industrial problems not necessarily related with smoothing out a manufactured surface. Burnishing is a modern technology widely used in aircraft and automotive industries to the products as well as to process tools. It gives to the machined surface high smoothness, and good fatigue and wear resistance. Every burnished material behaves in a different manner. Process conditions strongly influence the final properties of any specific product. Optimum burnishing conditions should be preserved for any manufactured product. In this paper we deal with samples made of conventional tool steel -Sverker 21 (X153CrMoV12) and powder metallurgy (P/M) tool steel -Vanadis 6. Complete investigations of product properties are impossible to perform (because of constraints related to their cost, time, or lack of suitable equipment). Looking for a global, all-embracing quality indicator it was found that the correlation function and the frequency analysis of burnished surface give useful information for controlling the manufacturing process and evaluating the product quality. We propose three new indicators of burnishing surface quality. Their properties and usefulness are verified with the laboratory measurement of material samples made of the two mentioned kinds of tool steel.

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“…W przeprowadzonych badaniach największą liczbę mikropęknięć uzyskał dla najmniejszego natężenia prądu i najdłuższego czasu impulsu. Eliminacja niekorzystnych cech warstwy wierzchniej materiałów po obróbce EDM prowadzona jest wielokierunkowo i obejmuje min: stopowanie elektroerozyjne Electrical Discharge Alloying (EDA) [9], Brush Electrodischarge Mechanical Alloying (BEDMA) [12], zastosowanie proszków w dielektryku [5], modyfikację powierzchni wiązką lasera [10] czy też wykorzystanie dodatkowych obróbek mechanicznych min: ściernych.…”

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