Use of positron annihilation measurements to detect the defect beneath worn surface of stainless steel 1.4301 (EN) under dry sliding condition

Dryzek, Jerzy; Horodek, P.; Wróbel, Mirosław

doi:10.1016/j.wear.2012.07.006

Cited by 14 publications

(19 citation statements)

References 21 publications

(25 reference statements)

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“…Another interesting observation is a linear character of the discussed profiles. For comparison, in this kind of stainless steel the exponential decreasing was detected for dry sliding [25]. Also the exponential distribution was observed in sandblasted Mg [26].…”

Section: The Defect Depth Profile Of the Szmentioning

confidence: 63%

“…Its value is maximal for the perpendicular impact and should decrease with the angle according to the sine function. The dependency of the total depth on the applied load in sliding experiment was observed many times [25]. Another parameter important for the generation of the SZ depending on the angle is the velocity with which sand particles hit the surface.…”

Section: The Defect Depth Profile Of the Szmentioning

confidence: 95%

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Positron Annihilation and Complementary Studies of Stainless Steel Exposed to Sandblasting at Different Angles

et al. 2017

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Defect studies in subsurface zone in stainless steel 304 AISI samples exposed to sandblasting were performed using positron annihilation spectroscopy techniques. Samples were sandblasted with a different impact angle. Conventional experiments based on positrons emitted directly from the radioactive source allowed us to detect vacancies on the dislocation edges in all samples; however, the total depths of subsurface zones depended strictly on the impact angle, i.e., 35 lm for impact angle of 90°and about 12 lm for 30°. The complementary methods such as SEM and optical profilometry revealed also dependencies between the impact angle and roughness of the surface which are not observed in the variable energy positron beam examinations.

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Section: The Defect Depth Profile Of the Szmentioning

confidence: 63%

Section: The Defect Depth Profile Of the Szmentioning

confidence: 95%

Positron Annihilation and Complementary Studies of Stainless Steel Exposed to Sandblasting at Different Angles

et al. 2017

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“…In b, the same depth profiles but before cutting and taking measurements, the samples were annealed at the temperatures of 75, 100 and 175°C during 1 h after sliding. The error bar for all the measured points is presented in a stainless steel [24]. We argue that the stream of dislocations generated directly at the surface in the asperities moving in the interior of the sample is responsible for the constitution of the SZ.…”

Section: Discussionmentioning

confidence: 93%

The Annealing Behavior of the Subsurface Zone Induced by Friction in Bismuth Detected by Positron Lifetime Technique

Dryzek

2013

Tribol Lett

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The annealing behavior of the subsurface zone (SZ) in pure bismuth induced by dry sliding was studied using the positron lifetime measurement. This measurement allows us to detect the SZ and its recovery, and recrystallization processes. The comparative measurements of the sample exposed to compression revealed the thermal stability of the SZ. The compressed sample rebuilt its structure due to the recovery and recrystallization processes at the temperature of 60°C, whereas the sample exposed to dry sliding does it at higher temperature of 260°C, which is close to the melting point. The isothermal annealing at the temperature of 100°C confirmed these results. The defect depth profile induced by dry sliding evolves with the annealing temperature in such a way that the concentration of defects at the worn surface gradually decreases, but at the depth between 50 and 170 lm, the generation of new defects takes place at the temperature of 75, 100 and even at 175°C. At the temperature of 175°C, the defects still are extended up to the depth of about 60 lm from the worn surface. The results were qualitatively confirmed by the measurements of the Vickers microhardness depth profile. Similar annealing behavior of the SZ was observed in pure magnesium.

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“…open--volume defects such as vacancies and their agglomerates and to some extent dislocations can be identied and investigated using positron annihilation techniques. They have been used for example for detection of the subsurface zone in the stainless steel created by sliding or different methods of cutting [10,11]. The defects can be created also during phase transitions and those can be also detected by positron annihilation methods.…”

Section: Introductionmentioning

confidence: 99%

Reverse Transformation of Deformation Induced Martensite in Austenitic Stainless Steel

Dryzek

Sarnek

2014

Acta Phys. Pol. A

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Cumulative isochronal annealing of stainless steel 1.4307 samples deformed by compression was investigated using the Doppler broadening of the annihilation line measurements. Higher level of plastic deformation is accompanied not only by higher concentration of defects but also by higher amount of α martensite. The annealing studies revealed creation of defects in the temperature range between 450• C and 650• C pointing out the reverse transition of α martensite to austenite. This is conrmed by magnetic susceptibility and microhardness measurements.

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Use of positron annihilation measurements to detect the defect beneath worn surface of stainless steel 1.4301 (EN) under dry sliding condition

Cited by 14 publications

References 21 publications

Positron Annihilation and Complementary Studies of Stainless Steel Exposed to Sandblasting at Different Angles

Positron Annihilation and Complementary Studies of Stainless Steel Exposed to Sandblasting at Different Angles

The Annealing Behavior of the Subsurface Zone Induced by Friction in Bismuth Detected by Positron Lifetime Technique

Reverse Transformation of Deformation Induced Martensite in Austenitic Stainless Steel

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