Effect of laser shock peening on ratcheting strain accumulation, fatigue life and bulk texture evolution in HSLA steel

Dwivedi, Pushpendra Kumar; Kumar, Arun; Ganesh, P.; Ranganathan, K.; Bindra, K. S.; Dutta, Krishna

doi:10.1016/j.ijfatigue.2022.107033

Cited by 25 publications

(8 citation statements)

References 69 publications

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“…Owing to high strain accumulation in TBS and TMS, the intensity of {111}<112> component is also increased (Figure 28). Similar observations are also reported by Dwivedi et al (2022a, 2022b).…”

Section: Resultssupporting

confidence: 91%

“…During tensile testing, the normal stress causes elongation, whereas shear stress generates slip criterion that leads to shearing-type deformation and material breakage (Mouritz, 1994). Hence, the degree of deformation (shearing and uniaxial) and stress/strain accumulation was increased during tensile testing, which strengthened the ζ-fiber development (as reported by Dwivedi et al , 2022a; Jamaati et al , 2014). Similarly, our experimental investigation supports the ζ-fibre development after tensile testing.…”

Section: Resultssupporting

confidence: 53%

“…The enhancements in the degree of recrystallisation and grain refinement strengthen the ϒ-fibre development more than ζ-fibre. Past research studies by Dwivedi et al (2022a), Jamaati et al (2014) and Rupp et al (2020) also point out the ϒ-fiber development because of recrystallisation and grain refinement. From the texture intensity plot (Figure 28), the {111}<112> texture component of ϒ-fiber and {011}<100> of ζ-fiber has a higher intensity in the top section than middle and bottom sections of the deposit.…”

Section: Resultsmentioning

confidence: 95%

“…To understand the development of different kinds of fibre textures and their distinctive components, orientation distribution function (ODF) is necessary. Factors such as recrystallisation, temperature distribution, stress/strain accumulation, deformation path, type and degree of deformation were responsible for triggering a specific fibre texture in the material (Dwivedi et al , 2022a; Gondo et al , 2021; Jamaati et al , 2014; Rupp et al , 2020). Based on the diffraction patterns, the crystal symmetry of initial wire and deposits belongs to the body-centered cubic (BCC).…”

Section: Resultsmentioning

confidence: 99%

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Non-transferring arc and wire additive manufacturing: microstructure, mechanical properties and bulk texture evolution of deposits

Pattanayak,

Sahoo,

Sahoo

et al. 2024

RPJ

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Purpose This study aims to demonstrate a modified wire arc additive manufacturing (AM) named non-transferring arc and wire AM (NTA-WAM). Here, the build plate has no electrical arc attachment, and the system’s arc is ignited between tungsten electrode and filler wire. Design/methodology/approach The effect of various deposition conditions (welding voltage, travel speed and wire feed speed [WFS]) on bead characteristics is studied through response surface methodology (RSM). Under optimum deposition condition, a single-bead and thin-layered part is fabricated and subjected to microstructural, tensile testing and X-ray diffraction study. Moreover, bulk texture analysis has been carried out to illustrate the effect of thermal cycles and tensile-induced deformations on fibre texture evolutions. Findings RSM illustrates WFS as a crucial deposition parameter that suitably monitors bead width, height, penetration depth, dilution, contact angle and microhardness. The ferritic (acicular and polygonal) and lath bainitic microstructure is transformed into ferrite and pearlitic micrographs with increasing deposition layers. It is attributed to a reduced cooling rate with increased depositions. Mechanical testing exhibits high tensile strength and ductility, which is primarily due to compressive residual stress and lattice strain development. In deposits, ϒ-fibre evolution is more resilient due to the continuous recrystallisation process after each successive deposition. Tensile-induced deformation mostly favours ζ and ε-fibre development due to high strain accumulations. Originality/value This modified electrode arrangement in NTA-WAM suitably reduces spatter and bead height deviation. Low penetration depth and dilution denote a reduction in heat input that enhances the cooling rate.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Non-transferring arc and wire additive manufacturing: microstructure, mechanical properties and bulk texture evolution of deposits

Pattanayak,

Sahoo,

Sahoo

et al. 2024

RPJ

Self Cite

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“…Treatment creates favourable compressive residual stresses with a hardened surface layer but causes intergranular corrosion, which does not increase service life due to low fatigue. In [8], the effect of laser impact hardening on the surface properties and tensile behaviour of ASTM A 588 grade D low alloy steel was studied. It was found that laser technology h improves mechanical surface properties without a significant deterioration in surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Laser heat treatment effect on fatigue of hinged cantilever beams

Alisin

2023

E3S Web of Conf.

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The paper considers the effect of laser hardening treatment of steels on the fatigue strength of materials. The statement of efficiency of laser processing for formation of hard surface layer of processed surface which protects from wear is substantiated in relation to a hinge design in agricultural machines placed on a cantilever fastened beam which is a hinge axis. The phenomenon of reduction of fatigue characteristics of structural steels after laser treatment is investigated. Influence of fatigue loading on beam durability is analyzed. On the basis of experimental data analysis, the conclusion is formulated that the surface defects in the form of wells which are formed under the influence of laser pulse play an important role during the pulse laser treatment. Particular attention is paid to the role of residual stresses generated by the thermal effects of the laser. On the basis of this research, it is recommended that laser hardening treatment should be carried out, the pulse energy of which does not lead to surface melting.

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Significant Improvement in the Strength-Toughness and Isotropy of Laser Powder Bed Fusion Ti6Al4V Alloy by Combining Heat Treatment with Subsequent Laser Shock Peening

Lu,

Luo

2024

Laser Metallic Additive Manufacturing Technologies by Thermal-Mechanical Interaction

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Effect of laser shock peening on ratcheting strain accumulation, fatigue life and bulk texture evolution in HSLA steel

Cited by 25 publications

References 69 publications

Non-transferring arc and wire additive manufacturing: microstructure, mechanical properties and bulk texture evolution of deposits

Non-transferring arc and wire additive manufacturing: microstructure, mechanical properties and bulk texture evolution of deposits

Laser heat treatment effect on fatigue of hinged cantilever beams

Significant Improvement in the Strength-Toughness and Isotropy of Laser Powder Bed Fusion Ti6Al4V Alloy by Combining Heat Treatment with Subsequent Laser Shock Peening

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