Detail publikace

Initiation and growth of short fatigue cracks in austenitic Sanicro 25 steel

MAZÁNOVÁ, V. POLÁK, J.

Originální název

Initiation and growth of short fatigue cracks in austenitic Sanicro 25 steel

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Austenitic heat-resistant stainless steel Sanicro25, often used in energy production installations, was cyclically strained at room temperature, and initiation and growth of short fatigue cracks have been studied. Cylindrical specimens with pre-existing shallow noch were cyclically strained under constant total strain amplitudes, while the surface relief, crack initaition, and short crack growth were observed, in-situ, using optical and electron microscopes. Pestistent slip markings were found to be the principal locations where natural fatigue cracks initiated. The character of the crack paths of short cracks was studied using SEM and EBSD techniques. The results exhibit prevailing transgranular crack growth, ie, along the persistent slip markingswithin the grains. Tho growth of the longest cracks in the central part of the shallow noch was measured for different applied strain amplitudes. Because the coalescence of initiated plays a significant role during crack growth, the use of the "equivalent crack" concept gives adequate results in the description of the crack growth rate. The crack growth law of short crack was established and compared with the Manson-Coffin law of the material.

Klíčová slova

austenitic steel, crack growth, crack growth coefficient, crack initiation, EBSD, equivalent crack

Autoři

MAZÁNOVÁ, V.; POLÁK, J.

Vydáno

7. 7. 2018

Nakladatel

Wiley-Blackwell

ISSN

1460-2695

Periodikum

Fatigue and Fracture of Engineering Materials and Structures

Ročník

41

Číslo

7

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1529

Strany do

1545

Strany počet

17

URL

https://onlinelibrary.wiley.com/doi/abs/10.1111/ffe.12794

BibTex

@article{BUT158148,
  author="Veronika {Mazánová} and Jaroslav {Polák}",
  title="Initiation and growth of  short fatigue cracks in austenitic Sanicro 25 steel",
  journal="Fatigue and Fracture of Engineering Materials and Structures",
  year="2018",
  volume="41",
  number="7",
  pages="1529--1545",
  doi="10.1111/ffe.12794",
  issn="1460-2695",
  url="https://onlinelibrary.wiley.com/doi/abs/10.1111/ffe.12794"
}