scispace - formally typeset
Search or ask a question
Topic

Butt welding

About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the microstructure and fatigue performance of 6mm thick DH36 steel plates friction stir welded with sub-optimal process conditions, resulting in the development of embedded and surface breaking flaws.

25 citations

Journal ArticleDOI
01 Nov 2017-Optik
TL;DR: In this paper, dissimilar 2-mm thickness AA6000 and Ti6Al4V butt joints were produced by shifting an Yb fiber laser beam on the upper surface of the Ti sheet.

25 citations

Patent
19 Apr 2010
TL;DR: In this paper, a method of laser machining of a fiber-reinforced composite material is characterized in that the material or composite ply material is cut using an ultra short pulse solid-state laser having a pulsewidth ranging from 10 pico to 100 nano second and a pulse energy of 1mJ-500J, repeatedly irradiated to the material with the number of frequency ranging from10Hz to 100kHz.
Abstract: A method of laser machining of a fiber-reinforced composite material of the present invention is characterized in that the fiber-reinforced composite material or composite ply material (ply material consisting of plates of metal or inorganic material and fiber-reinforced material) is cut using an ultra short pulse solid-state laser having a pulse-width ranging from 10 pico to 100 nano second and a pulse energy of 1mJ-500J, repeatedly irradiated to the material with the number of frequency ranging from 10Hz to 100kHz. According to the present invention, it is possible to work, e.g., cut, pierce, groove, or carve a fiber-reinforced composite material including CFRP, by removing materials by means of a laser with a high precision and good quality. It is also possible to form a fitting joint of proper shape so that a male-female joint may be available in a butt welding that has been hardly feasible. It is further possible to produce structural members such as a light weight panel or a H-column because the male-female joint can be used for a plate of any desired dimension (width, length and thickness).

25 citations

Book ChapterDOI
TL;DR: In this article, the fatigue strength of very high strength steels with nominal strengths up to 1100 MPa has been investigated in the civil engineering industry, with and without transverse butt welds, and the results show that the characteristic fatigue strengths of these steels lie well above the values according to EN 1993-1-9.
Abstract: Very High Strength Steels (VHSS) with nominal strengths up to 1100 MPa have been available on the market for many years. However, the use of these steels in the civil engineering industry is still uncommon, due to lack of design and fabrication knowledge and therefore limited inclusion in codes. Moreover, in a fatigue loaded VHSS structure absolute and relative stress variation will be higher compared to stresses in structures made of lower grade steels. According to current design codes the fatigue strength of welded connections mainly depends on the applied detail, plate thickness and machining condition, not on steel grade. Recently experiments on plates made of S690 and S1100, with and without transverse butt welds, have been performed in order to study the fatigue strength. Test results show that the characteristic fatigue strengths of plates with and without transverse butt weld lay well above the values according to EN 1993-1-9, mainly because of higher slope of the S-N curves. Crack initiation phase of S1100 specimens is relatively long compared to S690 specimens, while crack propagation is relatively short. An efficient application of VHSS in welded connections requires high fabrication quality and avoidance of large stress concentration in joints.

25 citations

Journal ArticleDOI
TL;DR: In this article, the authors report test results showing how the heating-cooling process like the one occurring during fire action can affect the tensile strength and the deformation after rupture of the welded connections normally used in steel structures.

25 citations


Network Information
Related Topics (5)
Welding
206.5K papers, 1.1M citations
88% related
Fracture mechanics
58.3K papers, 1.3M citations
77% related
Alloy
171.8K papers, 1.7M citations
76% related
Microstructure
148.6K papers, 2.2M citations
75% related
Machining
121.3K papers, 1M citations
75% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202328
2022122
2021112
2020219
2019290
2018349