Evaluating surface deformation and near surface strain hardening resulting from shot peening a tempered martensitic steel and application to low cycle fatigue

2013 ◽  
Vol 54 ◽  
pp. 106-117 ◽  
Author(s):  
K.A. Soady ◽  
B.G. Mellor ◽  
G.D. West ◽  
G. Harrison ◽  
A. Morris ◽  
...  
Keyword(s):  
Strain Hardening ◽  
Shot Peening ◽  
Surface Deformation ◽  
Martensitic Steel ◽  
Low Cycle Fatigue ◽  
Surface Strain ◽  
Cycle Fatigue ◽  
Near Surface

Effect of surface-strain-hardening treatment on the low-cycle fatigue of a magnesium alloy

1983 ◽  
Vol 15 (8) ◽  
pp. 1050-1053
Author(s):  
V. A. Strizhalo ◽  
V. V. Khil'chevskii ◽  
M. V. Baumshtein ◽  
A. A. Chernyi ◽  
A. M. Fedorin
Keyword(s):  
Magnesium Alloy ◽  
Strain Hardening ◽  
Low Cycle Fatigue ◽  
Surface Strain ◽  
Cycle Fatigue ◽  
Hardening Treatment ◽  
Effect Of Surface

Short Crack Initiation during Low-Cycle Fatigue in SAF 2507 Duplex Stainless Steel

2007 ◽  
Vol 345-346 ◽  
pp. 343-346 ◽  
Author(s):  
M.C. Marinelli ◽  
Suzanne Degallaix ◽  
I. Alvarez-Armas
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Room Temperature ◽  
Low Cycle Fatigue ◽  
Fatigue Cracks ◽  
Surface Strain ◽  
The Other ◽  
Cycle Fatigue ◽  
Cyclic Tests ◽  
Characteristic Microstructure

In this work, the formation of fatigue cracks is considered as a nucleation process due to the development of a characteristic microstructure formed just beneath the specimen surface. Strain controlled cyclic tests were carried out at room temperature at total strain ranges εt = 0.8 and 1.2% in flat specimens of SAF 2507 Duplex Stainless Steel (DSS). The results show that for this DSS, at εt = 0.8%, the correlation between phases (Kurdjumov-Sacks crystallographic relation) plays an important role in the formation of microcracks. On the other hand, at εt = 1.2%, microcracks initiate in the ferritic phase and the K-S relation does not seem to affect the formation of the cracks.

Effect of Specimen Shape on the Low Cycle Fatigue Life of Reduced Activation Ferritic/Martensitic Steel

2010 ◽  
Vol 47 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Shuhei NOGAMI ◽  
Yuki SATO ◽  
Atsushi TANAKA ◽  
Akira HASEGAWA ◽  
Arata NISHIMURA ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Martensitic Steel ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Specimen Shape

Effect of Surface Recrystallization on the Low Cycle Fatigue Behavior of Directionally Solidified Superalloy DZ4 by In Situ SEM Studies

2012 ◽  
Vol 706-709 ◽  
pp. 2456-2461
Author(s):  
Xian Feng Ma ◽  
Hui Ji Shi
Keyword(s):  
Fatigue Life ◽  
Crack Growth ◽  
Shot Peening ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
Directionally Solidified ◽  
Annealing Heat Treatment ◽  
Crack Growth Rates

The effect of recrystallization on the low cycle fatigue life of DZ4 directionally solidified superalloy was investigated for specimens with three different recrystallized layers, which were generated by shot peening (0.1MPa, 0.3MPa and 0.5MPa respectively) and a subsequent annealing heat treatment. The fatigue life showed a decrease for recrystallized specimens with shot-peening of 0.1 MPa and 0.3 MPa, and an unusual increase for that of 0.5MPa, in comparison with the original DZ4 specimen. In-situ SEM observations were performed on the short crack growth behaviors for both original and recrystallized specimens, which revealed the fracture mechanism and the interaction with microstructure. Quantitative analysis of fatigue crack growth rates rationalized the influence of recrystallization on the low-cycle fatigue life of DZ4.

Sign in / Sign up

Export Citation Format

Share Document