Tuning strength-ductility combination on selective laser melted 316L stainless steel through gradient heterogeneous structure

Liu, Ying; Sun, Jiapeng; Fu, Yucheng; Xu, Bingqian; Li, Bangjun; Xu, Shijie; Huang, Peilong; Cheng, Jianing; Han, Ying; Han, Jing; Wu, Guosong

doi:10.1016/j.addma.2021.102373

Cited by 13 publications

(15 citation statements)

References 89 publications

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“…Figure 5 shows the comparison of strength and ductility of present 316L stainless steel fabricated by SLM. Compared with those previous reports [15,20,[23][24][25][26][27][28][29], our present work presented a higher strength and ductility combination. The unique dislocation network structure in SLM 316L stainless steel could hinder the dislocation movement during deformation, but the dislocation movement did not stop completely.…”

Section: Mechanical Propertiescontrasting

confidence: 73%

“…According to the TEM image in figure 2(e), the as-SLM sample exhibits finer substructures with an average cell size of 0.36 μm, less than the average cell size studied by Liverani et al [15] andMarattukalam et al [27]. Thus, the substructure maintained a steady plastic flow throughout the tensile deformation stage to improve ductility [29].…”

Section: Mechanical Propertiesmentioning

confidence: 83%

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Twinning behavior in deformation of SLM 316L stainless steel

Yang

Zhao

Kan

et al. 2022

Mater. Res. Express

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The present work investigates the microstructures, mechanical properties and deformation behaviors of the 316L stainless steel fabricated by selective laser melting (SLM). The initial dislocation density of as-SLM and conventional samples is measured using X-ray diffraction (XRD). It is found that the high dislocation density is obtained by SLM, contributing to the enhancement of yield strength. Twinning has occurred at the early stage of SLM deformation, which undergoes obvious grain rotation and twinning development during the tensile tests. However, only a few transformed martensite is presented in the deformed samples, and no significant grain orientation changes are observed.

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Section: Mechanical Propertiescontrasting

confidence: 73%

Section: Mechanical Propertiesmentioning

confidence: 83%

Twinning behavior in deformation of SLM 316L stainless steel

Yang

Zhao

Kan

et al. 2022

Mater. Res. Express

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“…To demonstrate this, Liu et al [53] are among many who have created a link between the mechanical hardness and tensile performance of USRP components. In this work, selective laser melted (SLM) 316L SS was subjected to a four-pass treatment of USRP using a frequency of 28 kHz, the amplitude of 5 µm, a static load of 1200 N, the scanning velocity of 0.02 ms −1 , and a tip diameter of 14 mm.…”

Section: Effect Of Usrp On Mechanical and Tribological Properties Of Engineering Materialsmentioning

confidence: 99%

Ultrasonic Surface Rolling Process: Properties, Characterization, and Applications

et al. 2021

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Ultrasonic surface rolling process (USRP) is a novel surface severe plastic deformation (SPD) method that integrates ultrasonic impact peening (UIP) and deep rolling (DR) to enhance the surface integrity and surface mechanical properties of engineering materials. USRP can induce gradient nanostructured surface (GNS) layers on the substrate, providing superior mechanical properties, thus preventing premature material failure. Herein, a comprehensive overview of current-state-of-the art USRP is provided. More specifically, the effect of the USRP on a broad range of materials exclusively used for aerospace, automotive, nuclear, and chemical industries is explained. Furthermore, the effect of USRP on different mechanical properties, such as hardness, tensile, fatigue, wear resistance, residual stress, corrosion resistance, and surface roughness are summarized. In addition, the effect of USRP on grain refinement and the formation of gradient microstructure is discussed. Finally, this study elucidates the application and recent advances of the USRP process.

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“…Another numerical strategy for predicting microstructure in terms of processing parameters relies on direct simulation of the physical processes at the atomic or mesoscopic levels, using molecular dynamics or phase-field modeling, respectively. Both approaches were explored for advancing AM (Singh et al , 2021) and for the 316 L alloy in particular (Chadwick and Voorhees, 2021; Liu et al , 2021; Zhang et al , 2019d). However, this type of simulation is computationally demanding, limiting its applicability for coupling with the currently used design software.…”

Section: Introductionmentioning

confidence: 99%

Microstructure simulation and experimental evaluation of the anisotropy of 316 L stainless steel manufactured by laser powder bed fusion

Barrionuevo

Ramos‐Grez²,

Walczak³

et al. 2022

RPJ

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Purpose The effect of processing parameters on the microstructure of steel produced by laser-based powder bed fusion (LPBF) is a recognized opportunity for property design through microstructure control. Because the LPBF generates a textured microstructure associated with high anisotropy, it is of interest to determine the fabrication plane that would generate the desired property distribution within a component. Design/methodology/approach The microstructure of 316 L produced by LPBF was characterized experimentally (optical, scanning electron microscopy, glow discharge emission spectrometry and X-ray diffraction), and a finite element method was used to study the microstructure features of grain diameter, grain orientation and thermal parameters of cooling rate, thermal gradient and molten pool dimensions. Findings The computational tool of Ansys Additive was found efficient in reproducing the experimental effect of varying laser power, scanning speed and hatch spacing on the microstructure. In particular, the conditions for obtaining maximum densification and minimum fusion defects were consistent with the experiment, and the features of higher microhardness near the component’s surface and distribution of surface roughness were also reproduced. Originality/value To the best of the author’s knowledge, this paper is believed to be the first systematic attempt to use Ansys Additive to investigate the anisotropy of the 316 L SS produced by LPBF.

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Tuning strength-ductility combination on selective laser melted 316L stainless steel through gradient heterogeneous structure

Cited by 13 publications

References 89 publications

Twinning behavior in deformation of SLM 316L stainless steel

Twinning behavior in deformation of SLM 316L stainless steel

Ultrasonic Surface Rolling Process: Properties, Characterization, and Applications

Microstructure simulation and experimental evaluation of the anisotropy of 316 L stainless steel manufactured by laser powder bed fusion

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