The formation of martensite during wear of AISI 304 stainless steel

Zandrahimi, Morteza; Bateni, M. Reza; Poladi, A.; Szpunar, Jerzy A.

doi:10.1016/j.wear.2007.01.107

Cited by 71 publications

(32 citation statements)

References 8 publications

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“…SZ represents the region exposed to elastic and plastic deformations introduced below the surface, e.g., as a result of surface treatment process [1]. The studies of SZ are usually performed using conventional engineering methods such as microhardness tests and other analytical techniques like TEM, SEM, XRD [2]. These methods provide wide characteristics; however, plastic deformations occurring during treatment generate structural defects which are largely undetected by the above-mentioned methods.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

et al. 2017

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“…The presence of the subsurface zone (SZ), physical properties of which differ from those in the interior of a material [1] may influence the performance of the surface in service. For inspection of such alternations profilometry, microscopy, hardness testing, SEM, TEM [2] X-ray diffraction can be used [3,4]. Positron annihilation spectroscopy is seldom used for this purpose; however; it is a widely used technique for detecting of the defects at the atomic scale [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Positron Annihilation Study of Defects Induced by Various Cutting Methods in Stainless Steel Grade 304

2011

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We report in this article the comparison of the subsurface zones (SZs) in austenitic stainless steel 304 samples created by three cutting techniques, i.e., the laser cutting (LC), abrasive water jet (AWJ), and traditional milling cutting (MC). The crystal lattice defects distribution in this zone were investigated using the positron annihilation method. It was shown that the MC creates the great number mainly edge dislocations decorated by vacancies. Their concentration decreases with the increase of the depth from the cut surface. The total depth of the SZ is extended up to 150 lm from the cut surface. Similar dependency was observed for the AWJ machining but the total depth is much lower, i.e., 40 lm. The laser cut machining generates the zone with the lowest concentration of defects which does not vary with the depth. However, LC affects the sample up to the depth of about 500 lm. The degree of the surface roughness is similar for laser cut and AWJ, but for the MC it is five times smaller.

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“…Os gráficos gerados são os denominados difratogramas. Conforme apresentado por Zandrahimi [10], o lixamento e manuseio da amostra pode gerar martensita, daí uma das justificativas da necessidade de realizar a decapagem. A fim de comprovar tal fenômeno, a amostra lixada também passou pelo ensaio de DR-X.…”

Section: Resultsunclassified

Estudo Da Resistência À Corrosão Do Aço Inoxidável Aisi 304 Em Água Do Mar Natural E Artificial

Andrade¹,

Abreu²,

Aguilar³

et al. 2017

Anais Do Congresso Anual Da ABM

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ResumoEste trabalho avaliou a influência da deformação na formação de martensita e consequente resistência à corrosão do aço inoxidável austenítico AISI 304. O aço foi deformado em cisalhamento de 10%, 25%, 30%, 50% e 55% de deformação efetiva e em seguida mergulhado em solução contendo água do mar natural e artificial. As amostras imersas em solução de água do mar artificial exibiram aumento da massa enquanto as mergulhadas em água natural, redução. Esses resultados podem ser associados com a aderência inicial e estável de íons metálicos advindos dos cloretos, à superfície do material mergulhado em água do mar artificial. Palavras-chave: Corrosão; Atmosfera marinha; Aço inoxidável AISI 304; Martensita. STUDY OF THE CORROSION RESISTANCE OF STAINLESS STEEL AISI 304 IN NATURAL AND ARTIFICIAL SEA WATER AbstractThis work evaluated the influence of deformation on the formation of martensite and consequent corrosion resistance of austenitic stainless steel AISI 304. This steel was pre-strained by shearing tests up to 10%, 25%, 30%, 50% and 55% of effective strain and immersed in natural and artificial sea water. The samples immersed in artificial sea water exhibited increased mass while immersed in natural water reduction. These results can be associated with the initial adhesion of the metal ions arising from chlorides, the surface of the material immersed in artificial seawater.

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The formation of martensite during wear of AISI 304 stainless steel

Cited by 71 publications

References 8 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

Positron Annihilation Study of Defects Induced by Various Cutting Methods in Stainless Steel Grade 304

Estudo Da Resistência À Corrosão Do Aço Inoxidável Aisi 304 Em Água Do Mar Natural E Artificial

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