Effects of sandblasting and HIP on very high cycle fatigue performance of SLM-fabricated IN718 superalloy

Yu, Chuanli; Huang, Zhiyong; Zhang, Zian; Jian, Wang; Shen, Jiebin; Xu, Zhiping

doi:10.1016/j.jmrt.2022.02.077

Cited by 29 publications

(2 citation statements)

References 46 publications

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“…Under cyclic loading, local stress concentration can arise due to surface defects like scratches and surface roughness or microstructural heterogeneities including grain boundaries, twin boundaries, brittle and hard precipitates, favorably oriented grains, and inclusions in Ni-based superalloys [26,35,[47][48][49]. These stress concentrations consequently lead to fatigue crack initiation.…”

Section: Type Of Defectsmentioning

confidence: 99%

On the Microstructure and High Cycle Fatigue of Near-Net Shape Pm-Hiped Inconel 625

Kalahroudi¹,

Sadek²,

Krakhmalev³

et al. 2023

Preprint

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Section: Type Of Defectsmentioning

confidence: 99%

On the Microstructure and High Cycle Fatigue of Near-Net Shape Pm-Hiped Inconel 625

Kalahroudi¹,

Sadek²,

Krakhmalev³

et al. 2023

Preprint

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“…Currently, important castings applications in aerospace and the military are required in HIP densification treatment [17]. HIP technology is also used in the post-processing of additively manufactured parts, and the combination of 3D printing technology and isostatic pressing technology has become a hot topic of research, providing a convenient implementation solution for the isostatic pressing of structurally complex products [19,[23][24][25][26][27]. The effects of HIP on SLM alloys such as aluminum alloy [23], magnesium alloy [19], titanium alloy [24,25], nickel alloys [26], and steels [27] have received significant attention.…”

Section: Introductionmentioning

confidence: 99%

Effects of HIP Process Parameters on Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated by SLM

Lv¹,

Li²,

Che³

et al. 2023

Metals

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Ti-6Al-4V titanium alloy products formed by selective laser melting (SLM) are characterized by high strength and low plasticity. In addition, there may be pores inside the material, which may become a fracture sprouting point and accelerate the failure of the parts. Using an optical microscope (OM), scanning electron microscope (SEM), and electronic universal testing machine, the effects of hot isostatic pressing (HIP) parameters on the microstructure and tensile property of SLM-formed Ti-6Al-4V titanium alloy were investigated. The results show that HIP performed below the β-phase transition temperature, and the structure of the Ti-6Al-4V titanium alloy is composed of an α phase and β phase. With the increase in the HIP temperature, the α lath coarsens into a short rod, the content of the β phase increases and coarsens, and the tensile strength and yield strength of Ti-6Al-4V show a decreasing trend. With an HIP process performed at a temperature of 910 °C and pressure of 130 MPa for 2 h, the Ti-6Al-4V titanium alloy obtains the best matching of strength and plasticity.

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Surface Modification of Additively Manufactured Inconel 718 Alloy by Low‐Energy High‐Current Electron Beam Irradiation

Demirtas,

Ivanov,

Purcek

et al. 2024

Adv Eng Mater

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The effect of low‐energy high‐current electron beam (LEHCEB) irradiation on the microstructure and nanohardness of Inconel 718 alloy produced by laser powder bed fusion additive manufacturing is investigated. The LEHCEB irradiation is applied to the alloy at three energy levels, and the resulting microstructural analysis of irradiated surfaces is conducted. The findings from this study demonstrate that the LEHCEB irradiation substantially changes the as‐built microstructure showing intragranular dendrites of different shapes and irregular‐shaped Laves phases. The columnar structure is formed in the modified near‐surface layer as a result of rapid heating and cooling during LEHCEB irradiation. Furthermore, all Laves phases dissolve in the modified layer. Nanoindentation hardness of the irradiated layer of the alloy increases from 593 ± 23 to 693 ± 13 Hv with the highest energy density of 15 J cm−2. This increment is attributed mainly to the dissolution of Laves phases and the formation of an ultrafine columnar structure where the columns are separated from each other by the district regions containing very thin interlayers of a secondary phase and a high amount of dislocations.

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Effects of sandblasting and HIP on very high cycle fatigue performance of SLM-fabricated IN718 superalloy

Cited by 29 publications

References 46 publications

On the Microstructure and High Cycle Fatigue of Near-Net Shape Pm-Hiped Inconel 625

On the Microstructure and High Cycle Fatigue of Near-Net Shape Pm-Hiped Inconel 625

Effects of HIP Process Parameters on Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated by SLM

Surface Modification of Additively Manufactured Inconel 718 Alloy by Low‐Energy High‐Current Electron Beam Irradiation

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