Dry-Sliding Wear Mechanisms of Shot-Peened Additive Manufactured Alpha Titanium Featuring TiB Particles

DiCecco, Liza‐Anastasia; Mehdi, Mehdi; Edrisy, Afsaneh

doi:10.1007/s11249-021-01456-4

Cited by 12 publications

(19 citation statements)

References 42 publications

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“…Similarly, Wagner and Luetjering note in their work that the observed depth of crack initiation sites could be correlated to the depth of residual tensile peak stress, where they observed that residual stresses significantly delayed crack propagation [24]. Hardening effects from the shot-peening process are reported to have an influence up to a subsurface depth of approximately 1 mm [29] (Figure 17)-as such, it is noted that fatigue crack initiation sites occurred within regions where hardening influences are minimal. Thus, crack initiation sites are believed to have occurred outside of the compressive residual stress layer introduced in samples, in the tensile-stress-balanced region.…”

Section: Discussionmentioning

confidence: 99%

“…In fatigue testing, the shot-peened PTA-SFFF Ti-TiB fatigue samples outperformed the untreated samples, showing a much higher 10 7 high-cycle fatigue strength with a highest value of 332.5 ± 5.4 MPa versus 282.5 ± 5.4 MPa for the untreated samples (Figure 12). The improved fatigue behavior from shot peening is attributed to the introduced compressive residual stresses, which led to localized increases of hardness at the surface of samples [29] and stress-induced cold worked microstructural changes such as deformation twins (Figures 9-11). This induced cold work resulted in the formation and growth of tensile deformation twins, which, in turn, resulted in increasing the hardness of the material even though the exact mechanism is still being contested in the scientific literature [37].…”

Section: Discussionmentioning

confidence: 99%

“…A localized hardening effect as a result of shot peening was observed at the treated surface, with hardening effects experienced up to 1 mm in depth from the surface of coupons prepared in the same manner [29]. In our recent work, we note that the peak hardness measured at the near-surface was found to be 400.4 HV, which decreased until a depth of 1 mm was reached where the measured hardness plateaued at an average value of 286.6 ± 6.3 HV [29].…”

Section: Surface Study Of the Influence Of Shot Peeningmentioning

confidence: 94%

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Fatigue Improvement of Additive Manufactured Ti–TiB Material through Shot Peening

DiCecco

Mehdi

Edrisy

2021

Metals

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In this work, fatigue improvement through shot peening of an additive manufactured Ti–TiB block produced through Plasma Transferred Arc Solid Free-Form Fabrication (PTA-SFFF) was investigated. The microstructure and composition were explored through analytical microscopy techniques such as scanning and transmission electron microscopy (SEM, TEM) and electron backscatter diffraction (EBSD). To investigate the isotropic behavior within the additive manufactured Ti–TiB blocks, tensile tests were conducted in longitudinal, diagonal, and lateral directions. A consistent tensile behavior was observed for all the directions, highlighting a nearly isotropic behavior within samples. Shot peening was introduced as a postmanufacturing treatment to enhance the mechanical properties of AM specimens. Shot peening led to a localized increase in hardness at the near-surface where stress-induced twins are noted within the affected microstructure. The RBF-200 HT rotating-beam fatigue machine was utilized to conduct fatigue testing on untreated and shot-peened samples, starting at approximately 1/2 the ultimate tensile strength of the bulk material and testing within low- (<105 cycles) to high-cycle (>105 cycles) regimes. Shot-peened samples experienced significant improvement in fatigue life, increasing the fitted endurance limit from 247.8 MPa for the untreated samples to 318.3 MPa, leading to an increase in fatigue resistance of approximately 28%.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Surface Study Of the Influence Of Shot Peeningmentioning

confidence: 94%

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Fatigue Improvement of Additive Manufactured Ti–TiB Material through Shot Peening

DiCecco

Mehdi

Edrisy

2021

Metals

Self Cite

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“…Shot peening transmits high kinetic impacting energy of small particles onto solid surface, and produces multi-aspects beneficial results. By using shot peening, the fretting fatigue strength of 7075-T651 aluminum alloy has been improved [468], the dry sliding wear resistance of the additive manufactured alpha titanium has been increased [469], friction coefficient of the gear steel has been reduced [470]. Severe vibratory peening (SVP) is a variant technique of conventional shot peening, and it has been applied to harden hot rolled 1020 mild steel [471].…”

Section: Particle Shot Peening Laser Shock Peening and Plasma Jet Har...mentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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“…Recently, additive manufacturing (AM) shows great potential in producing metallic materials with tailored microstructures and superior mechanical properties compared to traditional manufacturing processes [4,[7][8][9][10][11][12][13][14]. However, the difficulty remains for manufacturing dense parts of Cu-based alloys through the AM due to their high reflectivity against infrared laser [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

High Wear Resistance and Mechanical Performance of NiAl Bronze Developed by Electron Beam Powder Bed Fusion

et al. 2021

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This work reports the additively manufactured NiAl bronze alloys via electron beam powder bed fusion (EB-PBF) that exhibit improved wear resistance without an increase of friction, exceeding those of conventional hot-rolled counterparts. High wear resistance is attributed to the formation of a Cu-O-rich transfer layer, and to exceptional mechanical strength induced by integrated effects including uniformly distributed precipitation, grain refinement, martensitic transformation around stacking faults, and a modulus mismatch between precipitates and the matrix. The simulation results indicate that the effect of the precipitate distribution on the internal stress field of the matrix is dependent on the external force direction. For the shear force, the uniformly distributed precipitates promote the overall stress concentration of the matrix, leading to its high work-hardening capability that plays a role in improving the wear resistance. This study reveals the potential of the EB-PBF technique to develop alloys with high wear resistance.

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Dry-Sliding Wear Mechanisms of Shot-Peened Additive Manufactured Alpha Titanium Featuring TiB Particles

Cited by 12 publications

References 42 publications

Fatigue Improvement of Additive Manufactured Ti–TiB Material through Shot Peening

Fatigue Improvement of Additive Manufactured Ti–TiB Material through Shot Peening

A review of advances in tribology in 2020–2021

High Wear Resistance and Mechanical Performance of NiAl Bronze Developed by Electron Beam Powder Bed Fusion

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