In situ neutron diffraction study of the low cycle fatigue of the α−γ duplex stainless steel

Jenčuš, P.; Polák, Jaroslav; Lukáš, P.; Muránsky, Ondrej

doi:10.1016/j.physb.2006.06.109

Cited by 8 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Second, the γand α-phases exhibit similar behavior in the elastoplastic regime, resulting in relatively weak interphase interactions [54], and both phases deform simultaneously [55,56]. However, the following discussion suggests that these results are universal.…”

Section: Possible Explanations For Swirling Patternmentioning

confidence: 89%

Principles and Technical Parameters of High‐Pressure Torsion

Valiev¹,

Zhilyaev²,

Langdon³

2013

Bulk Nanostructured Materials

View full text Add to dashboard Cite

Section: Possible Explanations For Swirling Patternmentioning

confidence: 89%

Principles and Technical Parameters of High‐Pressure Torsion

Valiev¹,

Zhilyaev²,

Langdon³

2013

Bulk Nanostructured Materials

View full text Add to dashboard Cite

“…Low cycle fatigue was studied in an SAF 2507 IX~ y duplex stainless steel subjected to fatigue loading, at TKSN-400/NPI. 87 In this alloy, an initial thermal stress state was present which was relieved during the first tension-compression cycle, enabling the stress free cell parameters to be determined. The measured austcntitc and ferrite stresses were + 187 and -103 MPa respectively, values consistent with the respc.…”

Section: Slipmentioning

confidence: 99%

Neutron Strain measurement

Krawitz

2011

Materials Science and Technology

View full text Add to dashboard Cite

The use of neutrons has extended the technique of diffraction strain measurement from an essentially two-dimensional, near-surface tool using X-rays to a true three-dimensional method. The depth scale has gone from micrometres to millimetres. This initially gave rise to subsurface measurements of type I residual macrostresses in weldments and type II residual microstresses in anisotropic and multiphase metals, and composites. Soon the possibilities of in situ applied stress measurements became apparent and today they represent a significant portion of the work being carried out. This perspective focuses on the current state of the art, the prospects and developments necessary for further progress. The transition from two- to three-dimensions raised the issues of stress free reference values, methodology for general tensor measurements, beam optics and experimental design. Workers invested great effort in resolving these issues. In addition, the development of pulsed source instruments has enabled in situ measurements of slip, fatigue, load partitioning, twinning, high T stress-strain response, thermal cycling and the shape memory effect. Most recently, the SNS instrument, VULCAN, has introduced torsion and continuous recording of data which can later be binned in the shortest statistically significant time intervals.

show abstract

Fatigue Strength, Crack Initiation, and Localized Plastic Fatigue Damage in VHCF of Duplex Stainless Steels

Tofique

Bergström

Burman

et al. 2015

steel research int.

View full text Add to dashboard Cite

The fatigue strength of two-duplex stainless steel grades, 2304 SRG and LDX 2101, with austenitic-ferritic microstructure is tested using ultrasonic fatigue testing equipment operating at 20 kHz. The testing is conducted in tension-compression mode with the load ratio R ¼ À1. The fatigue strength is evaluated at 10 7 , 10 8 , and 10 9 load cycles and the estimates of fatigue strength are higher for the LDX 2101 grade. The fatigue crack initiation mechanisms are analyzed using a scanning electron microscope. The fatigue cracks, in all cases, appear to initiate due to accumulation of plastic fatigue damage at the surface. In the 2304 SRG grade, accumulation of fatigue damage occurs at the external surface of fatigued specimens in the form of extrusions at the grain/phase boundaries and in the form of individual slip lines in the austenite phase. Meanwhile, in the LDX 2101 grade accumulation of plastic fatigue damage in the form of extrusions and intrusions occurs mainly within the ferrite grain. When the crack is microstructurally short, the crack growth appears to be crystallographic in nature and the crack appears to change its direction propagating from one grain into another.

show abstract

In situ neutron diffraction study of the low cycle fatigue of the α−γ duplex stainless steel

Cited by 8 publications

References 4 publications

Principles and Technical Parameters of High‐Pressure Torsion

Principles and Technical Parameters of High‐Pressure Torsion

Neutron Strain measurement

Fatigue Strength, Crack Initiation, and Localized Plastic Fatigue Damage in VHCF of Duplex Stainless Steels

Contact Info

Product

Resources

About