Analysis of the Influence of Laser Welding on Fatigue Crack Growth Behavior in a Newly Developed Nickel-Base Superalloy

Buckson, R.A.; Ojo, O.A.

doi:10.1007/s11665-014-1272-5

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…Ramkumar and Morteza Shamanian [12][13][14] discussed microstructure refinement and hot cracking susceptibility of nickel-based superalloys Hastelloy, Inconel 718 and N155 during pulsed current gas tungsten arc welding with Nb-free and austenitic filler wires. Zhengfei Hu, Sumit K. Sharma and R.A. Buckson [15][16][17] analyzed effect of heat input and heat treatment on dendrite morphology and growth, microstructure heterogeneity and heat-affected zone liquation cracking of newly developed Haynes 282, Inconel 718 and 18NiCo-free alloys during electron beam welding and laser welding. Renato Baldan and A. Szczotok [18,19] discussed effect of heat treatment and chemical compositions on dendrite growth thermodynamics and kinetics of nickel-based single-crystal superalloys CMSX-4 and MAR-M247.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Nucleation and Growth of Stray Grain Formation during Laser Welding Nickel-Based Single-Crystal Superalloy Part III: Kinetic and Thermodynamic Obviation of Solidification Cracking

Gao

2022

SSP

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To pertinently balance growth kinetics, solidification thermodynamics and dendrite expitaxy of multicomponent nickel-based single-crystal supralloy during laser processing, effect of thermometallurgy determinant factors, including laser power, welding speed and welding configuration, on solidification behavior, such as nonequilibrium solidification temperature range, and dendrite growth, such as dendrite trunk spacing, are progressively advanced to forestall solidification cracking phenomena. Symmetric developments of dendrite trunk spacing and solidification temperature range alongside solid/liquid interface are crystallographically driven by useful (001)/[100] welding configuration to auspiciously bring about crack-insusceptible and well-oriented dendrite growth. Dissimilarly, unsymmetrical developments of dendrite trunk spacing and solidification temperature range alongside solid/liquid interface are crystallographically driven by (001)/[110] welding configuration to insidiously favor crack-unresistant and disoriented dendrite growth. Higher heat input thermodynamically and kinetically boosts wide solidification temperature range, appalling stray grain growth with excess of solute ahead of dendrite tip and large size of crack-unresistant region to thermometallurgically disintegrate epitaxial growth for untoward solidification cracking, and therefore should be strictly withstood. Although geometry of symmetrical weld pool both sides is the same in infelicitous (001)/[110] welding configuration, [100] region of dendrite growth is more liable to ruinous stray grain growth and extensive solidification temperature range than [010] region of dendrite growth to complicate dendrite growth and exacerbate weld integrity. The determinant mechanism of crystallography-aided amelioration of solidification cracking resistance as result of kinetics-and thermodynamics-driven dendrite growth is propitiously proposed. Furthermore, the credible and understandable theoretical predictions are in conformity with the experiment results.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Nucleation and Growth of Stray Grain Formation during Laser Welding Nickel-Based Single-Crystal Superalloy Part III: Kinetic and Thermodynamic Obviation of Solidification Cracking

Gao

2022

SSP

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“…Lasersko zavarivanje je zavarivanje visoke gustine energije. Zavarivanje laserom nudi mnoge prednosti u odnosu na konvencionalne metode zavarivanja, a to su: visoka brzina zavarivanja, uska zona uticaja toplote, niska distorziju, jednostavnost automatizacije, mogućnost zavarivanja debelih preska u jednom prolazu i poboljšanu fleksibilnost dizajna [4][5][6][7][8]. Jedna od mnogih karakteristika laserskog zavarivanja je sposobnost zavarivanja bez dodatnog materijala.…”

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Picosecond laser shock peening of base Nimonic 263 material and laser welded Nimonic 263 alloy

Petronić¹,

Burzić²,

Milovanović³

et al. 2015

Zavarivanje i zavarene konstrukcije

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Kljucne reči: zavarivanje laserom, obrada laserom, ispitivanje zatezanjem, mikrostruktura,superlegura Ni Key words: laser welding, laser treatment, tensile testing, microstructure, superalloy Ni AbstractLaser welding is a welding process with a high energy density and numerous advantages over conventional welding methods (narrow heat affected zone, lower heat input, less distortion, and the like.) Mechanical treatment laser is an innovative technique for improving the properties of fatigue resistance, abrasion and corrosion resistance. In this paper, mechanically processed by laser two groups of samples; base materials and laser welded joints. Sheets made of Ni superalloy 2mm thick -millisecond Nd: YAG laser, while the mechanical treatment made picosecond Nd: YAG laser. Welds are tensile tested, and microstructure was observed by optical and scanning electron microscopy. The microhardness was measured by Vickers method with a load of 10 N. IzvodLasersko zavarivanje je proces zavarivanja sa velikom gustinom energije i mnogobrojnim prednostima u odnosu na konvencionalne metode zavarivanja (uska zona uticaja toplote, manji unos toplote, manja distorzija i sl.) Mehanička obrada laserom je inovativna tehnika kojom se poboljšavaju karakteristike otpornosti na zamor, habanje i otpornost na koroziju. U ovom radu, mehanički su obrađene laserom dve grupe uzoraka; osnovnog materijala i laserski zavarenih spojeva. Limovi superlegure debljine 2mm su zavareni milisekundnim Nd:YAG laserom, dok je mehanička obada obavljena pikosekundnim Nd:YAG laserom. Zavareni spojevi su ispitani zatezanjem, a mikrostruktura je posmatrana optičkim i skenirajućim elektronskim mikroskopom. Mikrotvrdoća je merena po Vikersu sa opterećenjem od 10 N. UvodNimonik 263 je superlegura nikla, projektovana za rad na visokim pritiscima i temperaturama. Ova superlegura ima dobru otpornost na koroziju, optimalne termičke karakteristike, kombinovane sa dobrom duktilnošću, otpornosti na puzanje i na zamor, kao i na otpornost na habanje [1][2][3]. U praksi se često koristi kada se od zavarenih spojeva očekuje bolja duktilnost. Lasersko zavarivanje je zavarivanje visoke gustine energije. Zavarivanje laserom nudi mnoge prednosti u odnosu na konvencionalne metode zavarivanja, a to su: visoka brzina zavarivanja, uska zona uticaja toplote, niska distorziju, jednostavnost automatizacije, mogućnost zavarivanja debelih preska u jednom prolazu i poboljšanu fleksibilnost dizajna [4][5][6][7][8]. Jedna od mnogih karakteristika laserskog zavarivanja je sposobnost zavarivanja bez dodatnog materijala. Mehanička obrada laserom (laser shock peening) je, za razliku od laserskog zavarivanja, mehanička obrada bez topljenja materijala. Ovom obradom se poboljšavaju karakteristike zamora materijala, otpornost na interkristalnu koroziju, otpornost na habanje i oksidaciju, kao i mehaničke osobine materijala. Ako se mehanička obrada laserom uspešno primenjuje, performanse zamora metalnih

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Hot Cracking of GTD-111 Nickel-Based Superalloy Welded by Pulsed Nd:YAG Laser

Taheri

Halvaee

Kashani-Bozorg

2020

Metallogr. Microstruct. Anal.

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Analysis of the Influence of Laser Welding on Fatigue Crack Growth Behavior in a Newly Developed Nickel-Base Superalloy

Cited by 5 publications

References 7 publications

Numerical Analysis of Nucleation and Growth of Stray Grain Formation during Laser Welding Nickel-Based Single-Crystal Superalloy Part III: Kinetic and Thermodynamic Obviation of Solidification Cracking

Numerical Analysis of Nucleation and Growth of Stray Grain Formation during Laser Welding Nickel-Based Single-Crystal Superalloy Part III: Kinetic and Thermodynamic Obviation of Solidification Cracking

Picosecond laser shock peening of base Nimonic 263 material and laser welded Nimonic 263 alloy

Hot Cracking of GTD-111 Nickel-Based Superalloy Welded by Pulsed Nd:YAG Laser

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