Paper Title:
Internal Fatigue Failure Mechanism of High Strength Steels in Gigacycle Regime
  Abstract

Gigacycle fatigue behavior in high-strength steels tested under rotary bending fatigue was summarized in this paper. Characteristic of the very high cycle fatigue is to be caused the transition of fracture mode from surface-induced fracture to subsurface inclusion-induced one. In the vicinity of an inclusion at the origin of internal crack, granular-bright-facet (GBF) area was formed during extremely long fatigue cycles. It was pointed out that the formation of GBF area was an important factor for the control of the internal fatigue fracture in gigacycle regime. The GBF area revealed a very rough granular morphology compared with the area outside the GBF inside the fish-eye zone, and was related to the carbide distribution in the microstructure of the matrix. From the detailed observation of fracture surface and computer simulation by FRASTA method, the GBF area formation mechanism in a gigacycle fatigue regime was proposed as the ‘dispersive decohesion of spherical carbide model’.

  Info
Periodical
Key Engineering Materials (Volumes 378-379)
Edited by
Dr. T. S. Srivatsan, FASM, FASME
Pages
65-80
DOI
10.4028/www.scientific.net/KEM.378-379.65
Citation
K. Shiozawa, L. T. Lu, "Internal Fatigue Failure Mechanism of High Strength Steels in Gigacycle Regime", Key Engineering Materials, Vols. 378-379, pp. 65-80, 2008
Online since
March 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Wen Jie Song, Wei Li
Chapter 5: Metal-Matrix Composites
Abstract:Rotary bending fatigue test was adopted to study the subsurface fracture property of a low alloy steel in very high cycle regime. As a...
1524
Authors: Taku Miura, Takayuki Sakakibara, Takanori Kuno, Akira Ueno, Shoichi Kikuchi, Tatsuo Sakai
Chapter 5: Influence of Small Damages Conditions
Abstract:In order to investigate the interior-induced fatigue crack propagation behavior of high cleanliness valve spring steel (JIS SWOSC-V),...
209
Authors: Akiyoshi Nakagawa, Benning Lian, Takashi Kondo, Douglas P. Romilly, Noriyasu Oguma, Masahiro Jono, Tatsuo Sakai
Chapter 6: Microstructure and Initiation Mechanism
Abstract:In order to ensure the long term durability of mechanical structures, the fatigue property of structural components should be clarified in...
255
Authors: Yong Jie Liu, Muhammad Kashif Khan, Qing Yuan Wang
Chapter 1: Scientometric Researches in Area of Very High Cycle Fatigue
Abstract:The top 10 most influential articles in Very high cycle fatigue (VHCF) have been indentified from web of science data. The attributes of the...
22