Fatigue crack growth towards the weld interface of alloy and maraging steels

Ukadgaonker, Vijay G.; Bhat, Sunil; Jha, Mahendra; Desai, P. B.

doi:10.1016/j.ijfatigue.2007.05.005

Cited by 27 publications

(11 citation statements)

References 16 publications

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“…Suresh et al conducted a pioneering work of fatigue crack propagation experiments with bi‐material specimens: the crack propagation rate increases (or decreases) when the crack approaches the interface from the stronger (or weaker) side. Similar conclusions were further confirmed by other experiments . In the numerical field, Wang et al simulate the fatigue crack propagation towards plastically mismatched interface with cohesive zone model, where the degradation of cohesive strength is load history dependent.…”

Section: Introductionsupporting

confidence: 65%

“…The crack tip plastic zone is assumed to be Dugdale strip yield region. When the crack tip plastic zone reaches the interface, the crack tip stress intensity factor K tip can be calculated as

\frac{K_{tip}^{2}}{4 σ_{A}} = K_{applied} \sqrt{\frac{2}{π} ((), a + l)} - \frac{σ_{normalA}}{π} ([], 2 ((), a + l)) + \frac{σ_{B} - σ_{A}}{π} ([], a ln ((), \frac{\sqrt{a + l} + \sqrt{l}}{\sqrt{a + l} - \sqrt{l}}) - 2 \sqrt{l ((), a + l)}),

and l can be calculated with

K_{applied} = 2 σ_{A} \sqrt{\frac{2}{π} ((), a + l)} + 2 ((), σ_{B} - σ_{A}) \sqrt{\frac{2 l}{π}},

where K applied is the stress intensity factor applied in the far field, a is the distance between crack tip and interface, and ( a + l ) is the plastic zone size. This equation can be extended to the fatigue loading conditions

\frac{normalΔ K_{tip_norminal}^{2}}{8 σ_{A}} = normalΔ K_{applied} \sqrt{\frac{2}{π} ((), a + l)} - \frac{2 σ_{A}}{π} ([], 2 ((), a + l)) + \frac{2 ((), σ_{B} - σ_{A})}{π} ([], a ln ((), \frac{\sqrt{a + l} + \sqrt{l}}{\sqrt{a + l} - \sqrt{l}}) - 2 \sqrt{l ((), a + l)}),

and l can be calculated with …”

Section: Introductionmentioning

confidence: 99%

“…Similar conclusions were further confirmed by other experiments. 1,13,[19][20][21][22][23][24][25][26] In the numerical field, Wang et al 27 simulate the fatigue crack propagation towards plastically mismatched interface with cohesive zone model, where the degradation of cohesive strength is load history dependent. Kolednick et al 4 numerically investigated the fatigue crack propagation in Pippan's experiments 20 with the crack tip stress intensity factor range ΔK tip , where ΔK tip = K max_tip − K min_tip .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Plastic mismatch effect on plasticity induced crack closure: Fatigue crack propagation perpendicularly across a plastically mismatched interface

Song

Shang

Shi

et al. 2018

Fatigue Fract Eng Mat Struct

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In the present work, comprehensive investigation of both theoretical analysis and numerical simulation was carried out to investigate the plastic mismatch effect on plasticity induced crack closure (PICC) behavior and effective fatigue crack tip driving force. During the process of crack tip approaching interface, crack tip load and crack tip load ratio will change, resulting in the change of PICC degree. When the crack propagates towards higher strength side, Kop/Kmax increases; when the crack propagates towards lower strength side, Kop/Kmax decreases firstly and then increases. The two mechanisms of “interface plastic mismatch effect on nominal fatigue crack tip driving force” and “interface plastic mismatch effect on PICC degree” were compared. The second mechanism must be considered when building crack tip driving force model for describing fatigue crack crossing plastically mismatched interface, because it is more physically factual and maybe more important than the first mechanism.

show abstract

Section: Introductionsupporting

confidence: 65%

“…The crack tip plastic zone is assumed to be Dugdale strip yield region. When the crack tip plastic zone reaches the interface, the crack tip stress intensity factor K tip can be calculated as

\frac{K_{tip}^{2}}{4 σ_{A}} = K_{applied} \sqrt{\frac{2}{π} ((), a + l)} - \frac{σ_{normalA}}{π} ([], 2 ((), a + l)) + \frac{σ_{B} - σ_{A}}{π} ([], a ln ((), \frac{\sqrt{a + l} + \sqrt{l}}{\sqrt{a + l} - \sqrt{l}}) - 2 \sqrt{l ((), a + l)}),

and l can be calculated with

K_{applied} = 2 σ_{A} \sqrt{\frac{2}{π} ((), a + l)} + 2 ((), σ_{B} - σ_{A}) \sqrt{\frac{2 l}{π}},

\frac{normalΔ K_{tip_norminal}^{2}}{8 σ_{A}} = normalΔ K_{applied} \sqrt{\frac{2}{π} ((), a + l)} - \frac{2 σ_{A}}{π} ([], 2 ((), a + l)) + \frac{2 ((), σ_{B} - σ_{A})}{π} ([], a ln ((), \frac{\sqrt{a + l} + \sqrt{l}}{\sqrt{a + l} - \sqrt{l}}) - 2 \sqrt{l ((), a + l)}),

and l can be calculated with …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plastic mismatch effect on plasticity induced crack closure: Fatigue crack propagation perpendicularly across a plastically mismatched interface

Song

Shang

Shi

et al. 2018

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…Onvestigations on pulsed current GTA welding on similar metal combinations were studied by different researchers such as in Onconel by Janakiram et al 3 , aluminium alloys by Madhusudhan Reddy et al 4,5 , Tantalum by Grill 6 . Elemental migration during welding process is one of the major concerns which affect the mechanical and corrosion properties 7,8 . Dilution has been a major problem in the dissimilar weldments that have been applied for sheathing the offshore structures of corrosion-poor steels with corrosion resistant Ni-Cu/Cu-Ni alloys.…”

Section: Introductionmentioning

confidence: 99%

Hot corrosion behavior of monel 400 and AISI 304 dissimilar weldments exposed in the molten salt environment containing Na2SO4 + 60% V2O5 at 600 °C

2014

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This research work investigates the use of pulsed current for joining two dissimilar metals Monel 400 and AOSO 304 using Pulsed Current Gas Tungsten Arc welding using three different filler metals such as ER309L, ERNiCu-7 and ERNiCrFe-3. Microstructure observations showed the presence of Partially Melted Zone (PMZ) at the heat affected zone (HAZ) of all the weldments. The formation of secondary phases was witnessed at the HAZ of Monel 400 on using ERNiCu-7 filler. Tensile studies corroborated that the bimetallic combinations employing ERNiCu-7 offer better tensile properties as compared to ER309L and ERNiCrFe-3 weldments. Parent metal Monel 400 exhibited better corrosion resistance as compared to other zones of the weldments when exposed in the synthetic molten salt environment containing Na 2 SD 4 -60% V 2 D 5 environment at 600 °C. A detailed structure -property relationship was made using the combined techniques of optical microscopy and SEM. Also the hot corrosion products were revealed using the thermogravimetric plots, XRD and SEM/EDAX analysis.

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“…Although shot peening induced a significant amount of compressive residual stress in the surface layer of the material, the improved fatigue crack propagation for nitrided and shot-peened, low-alloy steel resulted more from the surface hardening than from the residual stress due to shot peening, as reported by Pariente and Guagliano (2008). Ukadgaonker et al (2008) studied the effect of a strength gradient on the fatigue behavior of a welding joint, and the results showed that the fatigue crack growth was retarded when the crack propagated from the soft parent metal to the ultra-strong weld metal.…”

Section: Introductionmentioning

confidence: 99%

Effect of buffer layer and notch location on fatigue behavior in welded high-strength low-alloy

Zhang

Lü

et al. 2012

Journal of Materials Processing Technology

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Fatigue crack growth towards the weld interface of alloy and maraging steels

Cited by 27 publications

References 16 publications

Plastic mismatch effect on plasticity induced crack closure: Fatigue crack propagation perpendicularly across a plastically mismatched interface

Plastic mismatch effect on plasticity induced crack closure: Fatigue crack propagation perpendicularly across a plastically mismatched interface

Hot corrosion behavior of monel 400 and AISI 304 dissimilar weldments exposed in the molten salt environment containing Na2SO4 + 60% V2O5 at 600 °C

Effect of buffer layer and notch location on fatigue behavior in welded high-strength low-alloy

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