Prestrain effects on creep ductility of a 316 stainless steel light forging

Willis, M.R.; McDonaugh-Smith, A.; Hales, R.

doi:10.1016/s0308-0161(99)00007-1

Cited by 17 publications

(32 citation statements)

References 7 publications

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“…It is seen that the Monkman-Grant constant is relatively insensitive to pre-strain for prestrains below 20%, while for prestrain larger than 20% a reduction in the Monkman-Grant constant is observed. The contrast in the trend for creep ductility in [20] (observed dependence on prestrain) and Monkman-Grant parameters (lack of dependence on prestrain for prestrain < 20%) may be due to difficulties in identifying the failure strain in a creep test or due to the experimental data scatter caused by microstructural variability of this particular material. Note also that the data in [20] 316H material.…”

Section: Effects On Creep Fracturementioning

confidence: 92%

“…Willis et al [20] examined the effect of prestrain on the subsequent creep fracture behavior of PST 316H stainless steel at 575…”

Section: Effects On Creep Fracturementioning

confidence: 99%

“…Rupture ductility in terms of creep strain at failure was found to reduce with increasing prestrain level, while rupture life was found to be weakly dependent on prestrain level. To allow comparison with other data in this section, the creep ductility data of [20] are presented in Fig. 14 in terms of the Monkman-Grant relation.…”

Section: Effects On Creep Fracturementioning

confidence: 99%

See 2 more Smart Citations

A review of the effect of prior inelastic deformation on high temperature mechanical response of engineering alloys

O’Dowd

Davies

et al. 2010

International Journal of Pressure Vessels and Piping

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In this review article, we examine the influence of prior deformation (prestrain) on the subsequent high temperature mechanical behaviour of engineering alloys. We review the observed effects at a macroscopic level in terms of creep deformation, creep rupture times and crack growth rates from a number of sources and a range of materials. Microstructural explanations for the observed macroscopic effects are also reviewed and constitutive models which incorporate the effect of prior deformation are examined. The emphasis in the paper is on engineering steels though reference is also made to non ferrous alloys.

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Section: Effects On Creep Fracturementioning

confidence: 92%

“…Willis et al [20] examined the effect of prestrain on the subsequent creep fracture behavior of PST 316H stainless steel at 575…”

Section: Effects On Creep Fracturementioning

confidence: 99%

Section: Effects On Creep Fracturementioning

confidence: 99%

See 1 more Smart Citation

A review of the effect of prior inelastic deformation on high temperature mechanical response of engineering alloys

O’Dowd

Davies

et al. 2010

International Journal of Pressure Vessels and Piping

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“…• C [30,31]. A drastic reduction in the creep ductility and the minimum creep rate was observed for both PST and FST 316 stainless steels, while the failure time was found to decrease for the PST material and to increase for the FST material.…”

Section: Introductionmentioning

confidence: 96%

Experimental and Numerical Analysis of Initial Plasticity in P91 Steel Small Punch Creep Samples

et al. 2017

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To date, the complex behaviour of small punch creep test (SPCT) specimens has not been completely understood, making the test hard to numerically model and the data difficult to interpret. This paper presents a novel numerical model able to generate results that match the experimental findings. For the first time, pre-strained uniaxial creep test data of a P91 steel at 600 • C have been implemented in a conveniently modified Liu and Murakami creep damage model in order to simulate the effects of the initial localised plasticity on the subsequent creep response of a small punch creep test specimen. Finite element (FE) results, in terms of creep displacement rate and time to failure, obtained by the modified Liu and Murakami model are in good agreement with experimental small punch creep test data. The rupture times obtained by the FE calculations which make use of the non-modified creep damage model are one order of magnitude shorter than those obtained by using the modified constitutive model. Although further investigation is needed, this novel approach has confirmed that the effects of initial localised plasticity, taking place in the early stages of small punch creep test, cannot be neglected. The new results, obtained by using the modified constitutive model, show a significant improvement with respect to those obtained by a 'state of the art' creep damage constitutive model (the Liu and Murakami constitutive model) both in terms of minimum load-line displacement rate and time to rupture. The new modelling method will

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“…These properties depend on the full fabrication history including cold bending and swaging, welding, heat treatment and the effects of service ageing. For example, introduction of plastic strain can increase the susceptibility of materials to stress corrosion and creep damage [1,2]. It is important to quantify the initial material properties in weldments in order to understand and assess their influence on the life and integrity of components.…”

Section: Introductionmentioning

confidence: 99%

Effect of Prior Cold Work on the Mechanical Properties of Weldments

Acar

Güngör

Bouchard

et al. 2011

Experimental and Applied Mechanics, Volume 6

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Heat exchanger units used in steam raising power plant are often manufactured using many metres of austenitic stainless steel tubes that have been plastically formed (bent and swaged) and welded into complex shapes. The amount of plastic deformation (pre-straining) before welding varies greatly. This has a significant effect on the mechanical properties of the welded tubes and on the final residual stress state after welding. The aim of the present work was to measure and understand the combined effects of pre-straining and welding on the properties and residual stress levels in stainless steel tubing weldments. Effects of plastic deformation were simulated by plastically straining three identical stainless steel tubes to different strain levels (0%, 10% and 20%). Then each tube was cut into two halves and welding back together. The variation in mechanical properties across weldments was measured using digital image correlation (DIC) and a series of strain gauges (SG). Residual stresses were measured on the 0% (undeformed) and 20% prestrained and welded tubes by neutron diffraction. It was found that the welding process had a marked effect on the tensile properties of parent material within 25mm of the weld centre-line. Evidence of cyclic strain hardening was observed in the tube that had not been pre-strained, and evidence of softening seen in the 10% and 20% pre-strained tubes. Macroscopic residual stresses were measured to be near zero at distances greater than 25 mm from the weld centre-line, but measurements in the 20% pre-strained tube revealed the presence of micro residual stresses having a magnitude of up to 50 MPa.

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Prestrain effects on creep ductility of a 316 stainless steel light forging

Cited by 17 publications

References 7 publications

A review of the effect of prior inelastic deformation on high temperature mechanical response of engineering alloys

A review of the effect of prior inelastic deformation on high temperature mechanical response of engineering alloys

Experimental and Numerical Analysis of Initial Plasticity in P91 Steel Small Punch Creep Samples

Effect of Prior Cold Work on the Mechanical Properties of Weldments

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