Influence of Heat Treatment on Fatigue Crack Growth in Ti-6Al-4V Alloy

2011 ◽  
Vol 465 ◽  
pp. 463-466 ◽  
Author(s):  
Dariusz Rozumek
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Experimental Work ◽  
Fatigue Cracks ◽  
Stress Concentrators ◽  
Initiation And Propagation

The paper contains the results of experimental work carried out in order to analyse the initiation and propagation of fatigue cracks in Ti-6Al-4V titanium alloy. The tests were performed on plane specimens with the stress concentrators in form of one-sided sharp notches. The tested specimens were made of the oxygenated Ti-6Al-4V subjected to various variants of heat treatment.

Influence of Fillet Welded Joints Subjected to Cyclic Bending on Fatigue Crack Growth in S355 Steel

2016 ◽  
Vol 258 ◽  
pp. 615-618 ◽  
Author(s):  
Janusz Lewandowski ◽  
Dariusz Rozumek
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Experimental Work ◽  
Welded Joints ◽  
Fatigue Cracks ◽  
Fillet Welds ◽  
Cyclic Bending ◽  
Stress Concentrators ◽  
Initiation And Propagation

The paper contains the results of experimental work carried out in order to analyse the initiation and propagation of fatigue cracks in S355 steel. The tests were performed on plane specimens with the stress concentrators in form of the external two-sided blunt notches. Tests were performed on specimens with fillet welds (concave and convex) made of S355 steel, subjected to cyclic bending.

Fatigue Crack Growth in Titanium Alloy after Hardening and Ageing

2014 ◽  
Vol 598 ◽  
pp. 213-218
Author(s):  
Dariusz Rozumek ◽  
Maria Hepner ◽  
Ewa Marcisz
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Cracks ◽  
Experimental Tests ◽  
Cyclic Bending ◽  
The Core ◽  
Cracks Propagation

In this paper the results of experimental tests of the fatigue cracks propagation in Ti-6Al-4V titanium alloy subjected to cyclic bending are presented. The tests were performed on plane specimens with the stress concentrators in form of one-sided sharp notches. The tested specimens were made of the Ti-6Al-4V alloy subjected to oxygenating, and hardening and ageing. In the specimens after heat treatment, crack in the core has quite a different course than in the hardened oxygenated top layers.

scholarly journals Test of fatigue crack growth in welded specimens subjected to bending

2018 ◽  
Vol 67 (1) ◽  
pp. 185-196
Author(s):  
Janusz Lewandowski ◽  
Dariusz Rozumek ◽  
Maria Hepner
Keyword(s):  
Heat Treatment ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Welded Joints ◽  
Stress Ratio ◽  
Fatigue Cracks ◽  
Test Results ◽  
The Impact ◽  
Constant Moment

The paper presents the test results on the fatigue crack growth under cyclic bending specimens at constant moment amplitude made of S355 steel with fillet welds. Plane specimens with stress concentrators in form of the external two-sided blunt notches were tested. The tests were performed under constant value of the stress ratio R = –1 without and after heat treatment. The article also presents the test results of the microstructure of welded joints taking into account changes in the material after heat treatment and the impact of these changes on the fatigue life of specimens. Keywords: welded joints, fatigue cracks length, number of cycle, bending, microstructure

Fatigue Crack Growth in Titanium and Aluminium Alloys under Bending

2007 ◽  
Vol 567-568 ◽  
pp. 317-320 ◽  
Author(s):  
Dariusz Rozumek ◽  
Ewald Macha
Keyword(s):  
Titanium Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Aluminium Alloy ◽  
Crack Growth ◽  
Aluminium Alloys ◽  
Sharp Notch ◽  
Cyclic Bending ◽  
Stress Concentrators ◽  
Α Phase

The paper contains results of investigations of the crack growth in plane specimens made of Ti-6Al-4V titanium alloy and AlCu4Mg1 aluminium alloy under cyclic bending. The tests were done on specimens with the stress concentrators being one-sided sharp notch. On the fractures there have been observed first of all transcrystalline cracks through the α phase grains for both materials.

scholarly journals Fatigue Crack Growth in Welded S355 Samples Subjected to Bending Loading

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1394
Author(s):  
Janusz Lewandowski ◽  
Dariusz Rozumek
Keyword(s):  
Heat Treatment ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Welded Joint ◽  
Load Ratio ◽  
Experimental Tests ◽  
Test Results ◽  
Stress Concentrators ◽  
Bending Loading

The paper presents a result of experimental tests of welded S355 samples subjected to bending loading. In order to analyze how the fillet joints’ shape and the load ratio affect the crack growth, we selected two kinds of the fillet shape: concave and convex, and load ratios, namely R = −1. Samples with stress concentrators in form of the two-sided fillet welded joint were tested. The test results were compared to experiments conducted on welds samples with and without heat treatment.

Guided Wave Acoustic Emission from Fatigue Crack Growth in Aluminium Plate

2006 ◽  
Vol 13-14 ◽  
pp. 23-28 ◽  
Author(s):  
C.K. Lee ◽  
Jonathan J. Scholey ◽  
Paul D. Wilcox ◽  
M.R. Wisnom ◽  
Michael I. Friswell ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Elastic Waves ◽  
Fatigue Cracks ◽  
Guided Wave ◽  
Experimental Results ◽  
Multiple Reflections ◽  
Alloy Plate

Acoustic emission (AE) testing is an increasingly popular technique used for nondestructive evaluation (NDE). It has been used to detect and locate defects such as fatigue cracks in real structures. The monitoring of fatigue cracks in plate-like structures is critical for aerospace industries. Much research has been conducted to characterize and provide quantitative understanding of the source of emission on small specimens. It is difficult to extend these results to real structures as most of the experiments are restricted by the geometric effects from the specimens. The aim of this work is to provide a characterization of elastic waves emanating from fatigue cracks in plate-like structures. Fatigue crack growth is initiated in large 6082 T6 aluminium alloy plate specimens subjected to fatigue loading in the laboratory. A large specimen is utilized to eliminate multiple reflections from edges. The signals were recorded using both resonant and nonresonant transducers attached to the surface of the alloy specimens. The distances between the damage feature and sensors are located far enough apart in order to obtain good separation of guided-wave modes. Large numbers of AE signals are detected with active fatigue crack propagation during the experiment. Analysis of experimental results from multiple crack growth events are used to characterize the elastic waves. Experimental results are compared with finite element predictions to examine the mechanism of AE generation at the crack tip.

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
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