Effect of Environment on Fatigue Crack Wake Dislocation Structure in Al-Cu-Mg

2012 ◽  
Vol 43 (7) ◽  
pp. 2275-2292 ◽  
Author(s):  
Yunjo Ro ◽  
Sean R. Agnew ◽  
Richard P. Gangloff
Keyword(s):  
Fatigue Crack ◽  
Dislocation Structure ◽  
Crack Wake

scholarly journals Interpretation of hydrogen-assisted fatigue crack propagation in BCC iron based on dislocation structure evolution around the crack wake

2018 ◽  
Vol 156 ◽  
pp. 245-253 ◽  
Author(s):  
Domas Birenis ◽  
Yuhei Ogawa ◽  
Hisao Matsunaga ◽  
Osamu Takakuwa ◽  
Junichiro Yamabe ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Dislocation Structure ◽  
Structure Evolution ◽  
Crack Wake ◽  
Bcc Iron ◽  
Iron Based

Dislocation structure and fatigue crack growth in titanium alloy VT5-1ct at temperatures of 293-11 K

1993 ◽  
Vol 165 (2) ◽  
pp. 125-131 ◽  
Author(s):  
N.M. Grinberg ◽  
A.R. Smirnov ◽  
V.A. Moskalenko ◽  
E.N. Aleksenko ◽  
L.F. Yakovenko ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Dislocation Structure

Study on displacement field near fatigue crack wake measured using DIC

2019 ◽  
Vol 2019.68 (0) ◽  
pp. 126
Author(s):  
Hayato NONOYAMA ◽  
Toshifumi KAKIUCHI ◽  
Bing YANG ◽  
M. Neil JAMES ◽  
Yoshihiko UEMATSU
Keyword(s):  
Fatigue Crack ◽  
Displacement Field ◽  
Crack Wake

Temperature Dependence of Fatigue Crack Growth in Low-Carbon Steel Under Gaseous Hydrogen

2019 ◽  
Author(s):  
Osamu Takakuwa ◽  
Yuhei Ogawa ◽  
Saburo Okazaki ◽  
Hisao Matsunaga ◽  
Saburo Matsuoka
Keyword(s):  
Fatigue Crack ◽  
Carbon Steel ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Low Carbon Steel ◽  
Gaseous Hydrogen ◽  
Low Carbon ◽  
Hydrogen Environment ◽  
Crack Wake ◽  
Higher Temperature

Abstract In order to elucidate the temperature dependence of hydrogen-assisted fatigue crack growth (HAFCG), the fatigue crack growth (FCG) test was performed on low-carbon steel JIS-SM490B according to ASTM E647 using compact tension (CT) specimen under 0.7 MPa (≈ 0.1 ksi) hydrogen-gas at room temperature (RT: 298 K (≈ 77 °F)) and 423 K (≈ 302 °F) at stress intensity factor range of ΔK = 30 MPa m1/2 (≈ 27 ksi in1/2). Electron backscatter diffraction (EBSD) observation was performed on the mid-thick section of CT specimen in order to investigate change in plasticity around the crack wake in gaseous hydrogen environment and how it changes due to temperature elevation. The obtained results showed the higher temperature, the lower intense of HAFCG as reported in our previous article. Plasticity around the crack wake became less in gaseous hydrogen environment, especially tested at 298 K. The propensity of the results obtained at higher temperature (423 K) can be separated into two cases: (i) intense plasticity occurs like tested in air, (ii) crack propagates straighter accompanying less plasticity like tested in gaseous hydrogen environment at 298 K. This implies macroscopic FCG rate is determined by combination of microscopic FCG rate in the case (i) and case (ii).

Sign in / Sign up

Export Citation Format

Share Document