Almen intensity effect on microstructure and mechanical properties of low carbon steel subjected to severe shot peening

Ünal, Okan; Varol, Remzı

doi:10.1016/j.apsusc.2013.10.184

Cited by 104 publications

(37 citation statements)

References 24 publications

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“…The initiation of these cracks refers to the higher stress concentration on the machined flat surface as compared to its effect on the as-built surface, and thus results from the stress distribution on the as-built rough surface that heals the surface defects. The observation of these cracks is in agreement with the similar observation of surface crack initiation due to high SP intensities reported by Unal et al [24]. The trend of surface roughness change after SP shows a significant dependence on the original status of the surface topography, which is in agreement with a similar trend reported by Bagherifard et al [14].…”

Section: Methodssupporting

confidence: 82%

“…It was observed that the value of the affected depth after SP was increased, along with the Almen intensity, due to the higher amount of stress concentration applied to the surface. This is in good agreement with the trend reported by Unal et al [24]. The observations in Figure 7a,b show that the original surface texture before SP affects the depth of the layers deformed.…”

Section: Microstructure Characterizationsupporting

confidence: 82%

“…As shown in Figure 5e, the rougher surface is obtained by applying a higher-intensity SP than that obtained after using the low-intensity SP, as presented in Figure 5f. The increase of surface roughness after SP could negatively affect the fatigue and tensile strength [24]. Consequently, there should be an optimization of SP parameters to satisfy the design requirements of the product.…”

Section: Methodsmentioning

confidence: 99%

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Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Maamoun

Elbestawi

Veldhuis

2018

JMMP

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Abstract:The additive manufacturing (AM) of aluminum alloys promises to considerably enhance the performance of lightweight critical parts in various industrial applications. AlSi10Mg is one of the compatible Al alloys used in the selective laser melting of lightweight components. However, the surface defects obtained from the as-built parts affect their mechanical properties, and thus represent an obstacle to using them as final products. This study aims to improve the surface characteristics of the as-built AlSi10Mg parts using shot peening (SP). To achieve this goal, different SP intensities were applied to various surface textures of the as-built samples. The SP results showed a significant improvement in the as-built surface topography and a higher value of effective depth using 22.9 A intensity and Gp165 glass beads. The area near the shot-peened surface showed a significant microstructure refinement to a specific depth due to the dynamic precipitation of nanoscale Si particles. Surface hardening was also detected and high compressive residual stresses were generated due to severe plastic deformation. The surface characteristics obtained after SP could result in a significant improvement in the mechanical properties and fatigue strength, and thus promise performance enhancement for critical parts in various industrial applications.

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Section: Methodssupporting

confidence: 82%

Section: Microstructure Characterizationsupporting

confidence: 82%

Section: Methodsmentioning

confidence: 99%

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Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Maamoun

Elbestawi

Veldhuis

2018

JMMP

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“…Bu sonuç literatüre benzerlik göstermektedir [8]. Dövme süresinin artması ile doyurma oranı artmakta bu durumda yüzeyde aşırı plastik deforme olmuş tabaka kalınlığı artmakta ve buna ilave olarak tane incelmesinde artış ortaya çıkmaktadır [6]. Böylece yüzey bölgesinde artık gerilmeli, aşırı deforme olmuş yapının oluşması elektrik iletkenliğinin kısmen azalmasına neden olmuştur.…”

Section: şEkil 1 Elektrik Iletkenliği öLçüm Cihazının Genel Görünüşüunclassified

“…Bu aşırı plastik deformasyon sonrasında mikronaltı tanelerin elde edildiği bazı çalışmalarda rapor edilmiştir [6,7].…”

Section: Introductionunclassified

Alüminyum Alaşımlarında Bilyeli Dövmenin Elektrik İletkenliği Üzerine Etkisi

Alkan¹,

Varol²,

Selver³

2016

SDÜ Fen Bil Enst Der

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Özet: Bu çalışmada, bilyeli dövme işlemi uygulanmış bazı alüminyum alaşımlarının elektrik iletkenliği incelenmiştir. Metalik malzemelere uygulanan bir mekanik yüzey işlemi olan bilyeli dövme uygulanmış numunelerin elektrik iletkenliğinde değişiklik olup olmadığı deneysel olarak belirlenmeye çalışılmıştır. Bilyeli dövme işlemi özgül kütlesi düşük, korozyon direnci yüksek olan ve yaygın kullanım alanına sahip AA1050 ve AA2024 malzemelere uygulanmıştır. Bilyeli dövme işlemi uygulanacak numunelere dövme öncesi gerekli ısıl işlemler uygulanarak ısıl işlem uygulamasının etkisi de incelenmiştir. Bilyeli dövme işleminde kullanılan bilye çapları S230, S330 ve S460 olarak seçilmiştir. Bilyeli dövme işlemi hazırlanan levha şekilli numunelere tek taraflı ve iki (çift) taraflı olarak uygulanmıştır. Bilyeli dövme sonrası AA2024 malzemenin elektrik iletkenliği değerinde düşüşler belirlenmiştir. The Effect of Electrical Conductivity on Shot Peening in Aluminium AlloysKeywords Shot peening, Electrical conductivity, Al alloys Abstract: In this study, the electrical conductivity of shot peened some aluminium alloys was examined. The changing in electrical conductivity of as a mechanical surface treatment shot peened aluminium alloys. Shot peening was applied to widely used AA1050 and AA2024 aluminum alloys which have high corrosion resistance and low density. Before shot peeneing apropriate heat treatments were applied to the specimens. S230, S330 and S460 steel balls were selected as shot and used for shot peening process. Shot peening was applied as single-side and double side of prepared sheet shaped samples. Decreasing in electrical conductivity of shot peened AA2024 samples was determined.

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Wear Behavior of Severe Shot Peened and Thermally Oxidized Commercially Pure Titanium

Ünal

Karaoğlanlı

Ozgurluk

et al. 2018

Engineering Design Applications

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Almen intensity effect on microstructure and mechanical properties of low carbon steel subjected to severe shot peening

Cited by 104 publications

References 24 publications

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Alüminyum Alaşımlarında Bilyeli Dövmenin Elektrik İletkenliği Üzerine Etkisi

Wear Behavior of Severe Shot Peened and Thermally Oxidized Commercially Pure Titanium

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