scholarly journals Fatigue Fracture Characteristics of Ti6Al4V Subjected to Ultrasonic Nanocrystal Surface Modification

Metals ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 77 ◽  
Author(s):  
Xiaojian Cao ◽  
Luopeng Xu ◽  
Xiaoli Xu ◽  
Qingyuan Wang
Keyword(s):  
Surface Modification ◽  
Fatigue Fracture ◽  
Fracture Characteristics

Fatigue fracture characteristics of friction welded butt joints with corrosion pits

1996 ◽  
Vol 10 (4) ◽  
pp. 295-301
Author(s):  
Y Oh‐Ue ◽  
H Nakayama ◽  
Y Mukai ◽  
K Ogawa
Keyword(s):  
Fatigue Fracture ◽  
Butt Joints ◽  
Fracture Characteristics ◽  
Corrosion Pits

Investigations on the tooth root bending strength and the fatigue fracture characteristics of case-carburized and shot-peened gears of different sizes

2019 ◽  
Vol 233 (21-22) ◽  
pp. 7338-7349 ◽  
Author(s):  
KJ Winkler ◽  
S Schurer ◽  
T Tobie ◽  
K Stahl
Keyword(s):  
Fatigue Fracture ◽  
High Purity ◽  
Bending Strength ◽  
Tooth Root ◽  
Research Project ◽  
Fracture Characteristics

This paper contains data of the research project FVA 293 III by Schurer et al. and investigates the tooth root bending strength and the fatigue fracture characteristics of case-carburized and shot-peened gears of different sizes. The investigated carburized and shot-peened gears are made out of high-purity steel batches of the materials 20MnCr5 and 18CrNiMo7-6. Three different gear sizes with the normal modules mn = 1.5, 5, and 10 mm are examined in pulsator test rigs. Additionally, gear running tests in the FZG back-to-back gear test rigs for the gear size mn = 1.5 are performed.

Research on the Fatigue Fracture Surface of X60 Pipeline Steel after per-Tension Deformation

2012 ◽  
Vol 487 ◽  
pp. 423-426
Author(s):  
Yu Rong Jiang ◽  
Mei Bao Chen
Keyword(s):  
Fatigue Fracture ◽  
Stress Ratio ◽  
Pipeline Steel ◽  
High Stress ◽  
Dominant Factor ◽  
Fracture Mechanisms ◽  
Loading Frequency ◽  
Fatigue Fracture Surface ◽  
Static State ◽  
Fracture Characteristics

It is impossible to keep pipelines free from defects in the manufacturing, installation and servicing processes. In this paper, pre-tension deformation of X60 pipeline steel was employed to experimentally simulate the influence of dents and the fatigue fracture surfaces of X60 pipeline steel after per-tension deformation under cyclic loading were investigated. The results indicate that the static state tensile mechanics is the dominant factor in the fracture mechanisms at high stress ratio. With the decrease of the stress ratio R, the fractograph presents evident fatigue facture characteristics. The amount and intensity of MnS inclusion evidently increase with the loading frequency decrease and the typical cleavage fracture characteristics have been found.

Fatigue Properties and Fracture Characteristics of the Aluminum Alloys for High-Speed Train Carbody

2015 ◽  
Vol 1095 ◽  
pp. 437-441
Author(s):  
Fan Qiu ◽  
Qiang Li
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloys ◽  
Fatigue Fracture ◽  
High Speed ◽  
Fatigue Cracks ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Fracture Characteristics ◽  
Initiation Zone ◽  
Propagation Zone

The fatigue tests on two types of domestic aluminum alloys were conducted and the P-S-N curves of both aluminum alloys were obtained. The microscopic characteristics at the fatigue fracture surface were observed with scanning electron microscopy. The results show that the tensile strength of A7 is 376MPa, while the tensile strength of A6 is 311MPa. The fatigue strength of A7 is 75MPa at 107 circles, and it is just a little higher than that of A6, which is 71.57MPa. The fatigue cracks initiated from or near the surface of the specimen. The fatigue fracture can be divided into three parts, namely, the initiation zone, the propagation zone and the sudden fracture zone. Typical characteristics could be observed on fracture surface.A6 has better plasticity than A7.

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