scholarly journals Microstructure-based anisotropic fracture behavior of progressively cold drawn pearlitic steels and the subsequent crack path deflection: A Picassian Approach

2018 ◽  
Vol 9 ◽  
pp. 323-328 ◽  
Author(s):  
Jesús Toribio
Keyword(s):  
Fracture Behavior ◽  
Crack Path ◽  
Anisotropic Fracture

scholarly journals Cleavage Stress Producing Notch-Induced Anisotropic Fracture and Crack Path Deflection in Cold Drawn Pearlitic Steel

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 451
Author(s):  
Jesús Toribio ◽  
Francisco-Javier Ayaso
Keyword(s):  
Fracture Behavior ◽  
Materials Science ◽  
Crack Path ◽  
Steel Wire ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Element Analysis ◽  
Prestressing Steel ◽  
Anisotropic Fracture ◽  
Hot Rolled

The fracture performance of axisymmetric notched samples taken from pearlitic steels with different levels of cold-drawing is studied. To this end, a real manufacture chain was stopped in the course of the process (on-site in the factory), and samples of all intermediate stages were extracted from the initial hot-rolled bar (not cold-drawn at all) to the final commercial product (prestressing steel wire). Thus, the drawing intensity or straining level (represented by the yield strength) is treated as the key variable to elucidate the consequences of manufacturing on the posterior fracture issues. On the basis of a materials science approach, the clearly anisotropic fracture behavior of heavily drawn steels (exhibiting deflection in the fracture surface) is rationalized on the basis of the markedly oriented pearlitic microstructure of the cold-drawn steel that influences the operative micromechanism of fracture. In addition, a finite element analysis of the stress distribution at the fracture instant allows the computation of the cleavage annular stress required to produce anisotropic fracture behavior and thus crack path deflection associated with mixed-mode cracking. Results show that such a stress is the variable governing initiation and propagation of anisotropic fracture by cleavage (a specially oriented and enlarged cleavage fracture) appearing along the wire axis direction in the case of sharply-notched samples of heavily drawn pearlitic steels.

scholarly journals Hole Defects Affect the Dynamic Fracture Behavior of Nearby Running Cracks

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
R. S. Yang ◽  
C. X. Ding ◽  
L. Y. Yang ◽  
P. Xu ◽  
C. Chen
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Dynamic Fracture ◽  
Fracture Behavior ◽  
Dynamic Stress ◽  
Crack Path ◽  
Dynamic Stress Intensity Factor ◽  
Experimental System ◽  
Intersection Area

Effects of defects on the dynamic fracture behavior of engineering materials cannot be neglected. Using the experimental system of digital laser dynamic caustics, the effects of defects on the dynamic fracture behavior of nearby running cracks are studied. When running cracks propagate near to defects, the crack path deflects toward the defect; the degree of deflection is greater for larger defect diameters. When the running crack propagates away from the defect, the degree of deflection gradually reduces and the original crack path is restored. The intersection between the caustic spot and the defect is the direct cause of the running crack deflection; the intersection area determines the degree of deflection. In addition, the defect locally inhibits the dynamic stress intensity factor of running cracks when they propagate toward the defect and locally promotes the dynamic stress intensity factor of running cracks when they propagate away from the defect.

Characterization of Metal Foil in Anisotropic Fracture Behavior with Dynamic Tests

2018 ◽  
Author(s):  
Zhexin Pan ◽  
Puying Zhao ◽  
Xinqi Wei ◽  
Huili YU ◽  
Yong Xia
Keyword(s):  
Fracture Behavior ◽  
Metal Foil ◽  
Dynamic Tests ◽  
Anisotropic Fracture

Anisotropic Fracture Behavior in Ferroelectric Relaxor PZN-4.5%PT Single Crystals

2005 ◽  
Vol 88 (7) ◽  
pp. 1838-1844 ◽  
Author(s):  
William S. Oates ◽  
Christopher S. Lynch ◽  
Alain B. Kounga Njiwa ◽  
Doru C. Lupascu
Keyword(s):  
Single Crystals ◽  
Fracture Behavior ◽  
Ferroelectric Relaxor ◽  
Anisotropic Fracture
Sign in / Sign up

Export Citation Format

Share Document