Evaluation of the residual stress and microstructure character in SAF 2507 duplex stainless steel after multiple shot peening process

Chen, Ming; Liu, Huabing; Wang, Lianbo; Wang, Chengxi; Zhu, Kenny Q.; Xu, Zhenming; Jiang, Chuanhai; Ji, Vincent

doi:10.1016/j.surfcoat.2018.03.012

Cited by 68 publications

(22 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mechanical surface treatments play an important role in improving surface roughness and fatigue resistance by producing a compressive residual stress in the surface region of metallic parts [22][23][24][25][26][27]. The compressive stress results in a delayed crack initiation and retarded crack propagation.…”

Section: Introductionmentioning

confidence: 99%

Characterizing surface finish and fatigue behavior in binder-jet 3D-printed nickel-based superalloy 625

Mostafaei

Neelapu

Kisailus

et al. 2018

Additive Manufacturing

View full text Add to dashboard Cite

In this study, the fatigue properties of binder-jet 3D-printed nickel-base superalloy 625 were evaluated. Standard fatigue specimens were printed and sintered, then half of the samples were mechanically ground, while the other half were left in their as-sintered state. They were then characterized using micro-computed x-ray tomography, metallographic sample examination, and optical and stylus profilometry for surface topography. The micro-computed tomography observations showed that density of the as-printed sample was ~50%, while the sintered sample neared full densification (98.9 ± 0.3%) upon sintering at 1285 °C for 4 h in a vacuum atmosphere. The metallographic examination showed equiaxed grains. The roughness of the as-sintered samples was significant with an RMS roughness of Rq = 1.39 ± 0.20 μm as measured over a linescan of 5 mm, but this was reduced to Rq = 0.47 ± 0.02 μm after mechanical grinding. All samples were tested to failure in fatigue, under fully-reversed tension-compression conditions. While the as-sintered samples showed poor fatigue properties compared to prior reports on cast and milled parts, the ground samples showed superior performance. Scanning electron microscopy observation was conducted on the fractured surfaces and showed that the samples underwent transgranular crack initiation, followed by intergranular crack growth and final failure. In the mechanically ground sample, hardness increased nearly twofold up to 75 µm beneath the sample's surface and X-ray diffraction indicated an in-plane compressive stress, grain refinement, and micro-strain on the mechanically ground sample. The reduced roughness, surface hardening, and compressive stress resulted in increased fatigue life of the binder-jetted alloy 625.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterizing surface finish and fatigue behavior in binder-jet 3D-printed nickel-based superalloy 625

Mostafaei

Neelapu

Kisailus

et al. 2018

Additive Manufacturing

View full text Add to dashboard Cite

show abstract

“…Unal and Varol [2] also refer to the mechanical twins in AISI 304 after the CSP, SSP, and re-peening. Fargas et al [6] and Chen et al [7] clearly showed that extensive plastic deformation initiates phase transformations in duplex steel when the fraction of martensite increases at the expense of austenite. Moreover, the CSP process also remarkably increases the dislocation density and decreases the domain size in the near surface region.…”

Section: Introductionmentioning

confidence: 99%

Non-Destructive Evaluation of Steel Surfaces after Severe Plastic Deformation via the Barkhausen Noise Technique

Neslušan

Trško

Minárik

et al. 2018

Metals

View full text Add to dashboard Cite

This paper reports about the non-destructive evaluation of surfaces after severe shot peening via the Barkhausen noise technique. Residuals stresses and the corresponding Almen intensity, as well as microstructure alterations, are correlated with the Barkhausen noise signal and its extracted features. It was found that residual stresses as well as the Barkhausen noise exhibit a valuable anisotropy. For this reason, the relationship between the Barkhausen noise and stress state is more complicated. On the other hand, the near-the-surface layer exhibits a remarkable deformation induced softening, expressed in terms of the microhardness and the corresponding crystalline size. Such an effect explains the progressive increase of the Barkhausen noise emission along with the shot-peening time. Therefore, the Barkhausen noise can be considered as a promising technique capable of distinguishing between the variable regimes of severe shoot peening.

show abstract

“…Although many scholars have studied a lot of shot peening [ 29 , 30 , 31 ], the experimental research on shot peening of aluminum alloy-welded structures is rarely involved. In addition, operators mainly depend on experience to select shot peening parameters in the manufacturing practice [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Shot Peening on Redistribution of Residual Stress Field in Friction Stir Welding of 2219 Aluminum Alloy

Nie

Gong

et al. 2020

Materials

View full text Add to dashboard Cite

Welding is one of the essential stages in the manufacturing process of mechanical structures. Friction stir welding structure of aluminum alloy has been used as a primary supporting member in aerospace equipment. However, friction stir welding inevitably generates residual stress that promotes the initiation and propagation of cracks, threatening the performance of the welded structure. Shot peening can effectively change the distribution of residual stress and improve the fatigue properties of materials. In this paper, friction stir welding and shot peening are performed on 2219 aluminum alloy plates. The residual stress fields induced by friction stir welding and shot peening are measured by using the X-ray diffraction method and incremental center hole drilling method, and the distribution characteristics of residual stress fields are analyzed. The effect of the pellet diameters and pellet materials used in shot peening on the redistribution of welding residual stress field are investigated. The pellet diameter used in the experiment is in the range of 0.6–1.2 mm, and the pellet material includes glass, steel, and corundum. This study provides guidance for the application of shot peening in friction stir welding structure of 2219 aluminum alloy.

show abstract

Evaluation of the residual stress and microstructure character in SAF 2507 duplex stainless steel after multiple shot peening process

Cited by 68 publications

References 25 publications

Characterizing surface finish and fatigue behavior in binder-jet 3D-printed nickel-based superalloy 625

Characterizing surface finish and fatigue behavior in binder-jet 3D-printed nickel-based superalloy 625

Non-Destructive Evaluation of Steel Surfaces after Severe Plastic Deformation via the Barkhausen Noise Technique

Effect of Shot Peening on Redistribution of Residual Stress Field in Friction Stir Welding of 2219 Aluminum Alloy

Contact Info

Product

Resources

About