Effect of Shot and Laser Peening on Fatigue Strength of Additively Manufactured Aluminum Alloy with Rough Surfaces

Nakamura, Misato; Takahashi, Koji; Saito, Yuta

doi:10.1007/s11665-022-07225-1

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…Notably, the fatigue strengths of the as‐built specimens subjected to shot peening (as‐built + SP) and laser peening (as‐built + LP) at 10 7 cycles exhibited remarkable enhancements, surpassing that of the untreated as‐built specimen by 59% and 76%, respectively. These findings underscore the substantial efficacy of both shot peening and laser peening in significantly augmenting the fatigue strength of additively manufactured aluminum alloy specimens with rough surface topographies 12 . Balbaa et al studied the influence of shot peening on the fatigue life of IN625 and IN718 Ni‐based superalloys manufactured by LPBF.…”

Section: Introductionmentioning

confidence: 93%

“…These findings underscore the substantial efficacy of both shot peening and laser peening in significantly augmenting the fatigue strength of additively manufactured aluminum alloy specimens with rough surface topographies. 12 Balbaa et al studied the influence of shot peening on the fatigue life of IN625 and IN718 Ni-based superalloys manufactured by LPBF. The fatigue experiments indicated that shot peening had a beneficial effect on the fatigue characteristics of both superalloys.…”

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confidence: 99%

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Effect of shot peening on fatigue behavior and microstructure of additively manufactured Co‐Cr‐Mo alloy

Polat,

Saklakoglu

2023

Fatigue Fract Eng Mat Struct

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This investigation delved into the impact of shot peening on the fatigue properties of Co‐Cr‐Mo samples manufactured through laser powder bed fusion. Two primary groups were established, one subjected to stress relief heat treatment. Each group underwent further division, with one subgroup undergoing shot peening. Comprehensive microstructural, fractographic analyses and fatigue tests were conducted. Statistical analysis of fatigue results demonstrated a noteworthy difference (p < 0.05) between machined and shot‐peened samples across stress levels of 700–70, 600–60, and 500–50 MPa. A statistical significance was observed between machined and heat‐treated, then machined samples within 700–70 and 600–60 MPa stress levels. Fatigue analysis of heat‐treated, then machined samples revealed a shorter life comparing with machined samples at low cycle fatigue (<105), but superior performance at high cycle fatigue (>105). Fracture surface examinations indicated a planar structure with a distinctive quasi‐cleavage texture, affirming that shot peening enhances fatigue behavior by refining mechanical properties.

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Section: Introductionmentioning

confidence: 93%

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confidence: 99%

Effect of shot peening on fatigue behavior and microstructure of additively manufactured Co‐Cr‐Mo alloy

Polat,

Saklakoglu

2023

Fatigue Fract Eng Mat Struct

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Effects of Defects and Shot Peening on Fatigue Properties of Additively Manufactured CoCrFeNiTiMo-Based High-Entropy Alloys

Hayashi,

Kurita,

Watanabe

et al. 2024

J. of Materi Eng and Perform

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Recently, the automotive industry has increasingly focused on additive manufacturing as a new technology for reducing the weights of automobiles. In this study, fatigue tests were conducted on additively manufactured high-entropy alloys with different defect characteristics to clarify the relationships between their defect characteristics and fatigue strengths and to elucidate their fatigue fracture mechanisms. In addition, the effect of shot peening as an effective fatigue strength improvement method for an additively manufactured component was investigated. As a result, when defects formed by additive manufacturing were smaller than crystal grains, the numbers and sizes of defects affect fatigue crack growth behavior and barely affect fatigue life. Shot peening reduces the crack growth rate and is effective in extending the fatigue life. However, improvement in the fatigue limit is not achieved because the crack initiation site is a facet. From the above results, for defects smaller than the grain size, shot peening is a more effective method for improving fatigue life than reducing the numbers and sizes of defects.

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Towards a fracture mechanics-based fatigue assessment of lattice structures obtained from additive manufacturing of metallic powders

Collini,

Meneghetti

2024

Materials & Design

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Effect of Shot and Laser Peening on Fatigue Strength of Additively Manufactured Aluminum Alloy with Rough Surfaces

Cited by 6 publications

References 34 publications

Effect of shot peening on fatigue behavior and microstructure of additively manufactured Co‐Cr‐Mo alloy

Effect of shot peening on fatigue behavior and microstructure of additively manufactured Co‐Cr‐Mo alloy

Effects of Defects and Shot Peening on Fatigue Properties of Additively Manufactured CoCrFeNiTiMo-Based High-Entropy Alloys

Towards a fracture mechanics-based fatigue assessment of lattice structures obtained from additive manufacturing of metallic powders

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