Author: Welding InstitutePublisher:
ISBN:
Category : Steel
Languages : en
Pages : 204
Book Description
Fatigue Performance of Welded High Strength Steels
Author: Welding InstitutePublisher:
ISBN:
Category : Steel
Languages : en
Pages : 204
Book Description
Fatigue performance of welded high strength steels
Author: Welded High Strength Steel Structures
Author: Jin JiangPublisher: John Wiley & Sons
ISBN: 3527347267
Category : Technology & Engineering
Languages : en
Pages : 245
Book Description
Welded High Strength Steel Structures Understand the impact of fatigue on high strength steel joints with this comprehensive overview High strength steels are highly sought after for industrial and engineering applications ranging from armored vehicles to welded engineering components built to withstand considerable stress. The mechanical properties of welded joints made from high strength steel are integrally linked to the specific welding process, which can have an enormous impact on fatigue performance. Welded High Strength Steel Structures: Welding Effects and Fatigue Performance provides a comprehensive analysis of high strength steel joints and the ramifications of the welding process. It guides readers through the process of performing thermal analysis of high strength steel structures and evaluate fatigue performance in the face of residual stress. The result is a volume with innumerable use cases in engineering and manufacture. Welded High Strength Steel Structures readers will also find: An author with decades of experience in research and engineering Numerous studies of various classes of high strength steel joints Studies on tubular structures for welding residual stress Welded High Strength Steel Structures is a must-own for welding specialists, materials scientists, mechanical engineers, and researchers or industry professionals in related fields.
Improving the Fatigue Performance of Welded Stainless Steels
Author: Publisher:
ISBN: 9789279052590
Category :
Languages : en
Pages : 190
Book Description
As with C-Mn steels, fillet welds in stainless steels can display low fatigue strengths. Therefore, possible ways of improving their fatigue performance were investigated, by choice of welding process or the application of a post-weld improvement technique. Three types of fillet welded specimen were made from three stainless steels, namely 10 mm thick 304L austenitic and higher strength S31803 duplex and 3 mm thick high-strength Cr-Mn austenitic steel. One aim was to show that the higher strength steels gained more benefit from an improvement technique. The basic test series were MAG welded, but TIG and powder plasma arc welds (PPAW) were included to investigate possible improved fatigue performance from these welding processes. In addition, four weld toe improvement techniques were applied, namely weld profile improvement by grinding or re-melting the weld toe with a TIG or plasma torch (TIG or plasma dressing) and the introduction of compressive residual stress by ultrasonic impact treatment (UIT). The specimens were fatigue tested axially at R = 0.1 or under high tensile mean stress conditions. Most tests were performed in air under constant amplitude loading, but toe ground and plasma dressed specimens were also tested in 3 % NaCl solution, while some TIG dressed and UIT specimens were tested under variable amplitude loading. Many testing conditions were selected specifically to investigate features of actual service operation that might reduce the benefit of an improvement technique. The TIG and PPA welds did not produce better fatigue performance than MAG welds. However, all the improvement techniques were beneficial, the improvement increasing with decrease in applied stress range. The basic level of improvement in fatigue strength in air for R = 0.1 was 30 %. However, this could be greater; especially the increase in fatigue limit, or less, depending on the method of application of the improvement technique, the operating conditions and to some extent the original weld profile. Thus, success with the re-melting techniques depended on the achievement of a generous weld toe radius, while UIT of a poor profile weld could leave flaws in the deformed weld toe material and actually reduce the fatigue performance. Grinding was the most tolerant technique, but it was less suitable for the 3 mm Cr-Mn austenitic steel because of the significant loss of thickness. The benefit of the weld profile improvement techniques was reduced in 3 % NaCl solution but not under high tensile mean stress or variable amplitude loading. However, UIT, which relies on the presence of compressive residual stress, was of little benefit under such conditions. There was no fundamental difference in the effect of an improvement technique when applied to the low and high-strength steels, except that the higher strength duplex and Cr-Mn austenitic steels could sustain stresses above the yield strength of Type 304L austenitic. However, ground or dressed duplex welds performed slightly better than the austenitic steel in 3 % NaCl solution.
Welding and Joining of Advanced High Strength Steels (AHSS)
Author: Mahadev ShomePublisher: Elsevier
ISBN: 0857098586
Category : Technology & Engineering
Languages : en
Pages : 205
Book Description
Welding and Joining of Advanced High Strength Steels (AHSS): The Automotive Industry discusses the ways advanced high strength steels (AHSS) are key to weight reduction in sectors such as automotive engineering. It includes a discussion on how welding can alter the microstructure in the heat affected zone, producing either excessive hardening or softening, and how these local changes create potential weaknesses that can lead to failure. This text reviews the range of welding and other joining technologies for AHSS and how they can be best used to maximize the potential of AHSS. Reviews the properties and manufacturing techniques of advanced high strength steels (AHSS) Examines welding processes, performance, and fatigue in AHSS Focuses on AHSS welding and joining within the automotive industry
IIW Recommendations On Methods for Improving the Fatigue Strength of Welded Joints
Author: P J HaagensenPublisher: Woodhead Publishing
ISBN: 1782420657
Category : Technology & Engineering
Languages : en
Pages : 90
Book Description
The weld toe is a primary source of fatigue cracking because of the severity of the stress concentration it produces. Weld toe improvement can increase the fatigue strength of new structures significantly. It can also be used to repair or upgrade existing structures. However, in practice there have been wide variations in the actual improvements in fatigue strength achieved. Based on an extensive testing programme organised by the IIW, this report reviews the main methods for weld toe improvement to increase fatigue strength: burr grinding, TIG dressing and hammer and needle peening. The report provides specifications for the practical use of each method, including equipment, weld preparation and operation. It also offers guidance on inspection, quality control and training as well as assessments of fatigue strength and thickness effects possible with each technique. IIW recommendations on methods for improving the fatigue strength of welded joints will allow a more consistent use of these methods and more predictable increases in fatigue strength. Provides specifications for the practical use of each weld toe method, including equipment, weld preparation and operation Offers guidance on inspection, quality control and training, as well as assessments of fatigue strength and thickness effects possible with each technique This report will allow a more consistent use of these methods and more predictable increases in fatigue strength
Recommendations for Fatigue Design of Welded Joints and Components
Author: A. F. HobbacherPublisher: Springer
ISBN: 3319237578
Category : Technology & Engineering
Languages : en
Pages : 153
Book Description
This book provides a basis for the design and analysis of welded components that are subjected to fluctuating forces, to avoid failure by fatigue. It is also a valuable resource for those on boards or commissions who are establishing fatigue design codes. For maximum benefit, readers should already have a working knowledge of the basics of fatigue and fracture mechanics. The purpose of designing a structure taking into consideration the limit state for fatigue damage is to ensure that the performance is satisfactory during the design life and that the survival probability is acceptable. The latter is achieved by the use of appropriate partial safety factors. This document has been prepared as the result of an initiative by Commissions XIII and XV of the International Institute of Welding (IIW).
Design and Analysis of Fatigue Resistant Welded Structures
Author: Dieter RadajPublisher: Woodhead Publishing
ISBN: 9781855730045
Category : Medical
Languages : en
Pages : 386
Book Description
An English version of a sucessful German book. Both traditional and modern concepts are described.
Welded High Strength Steel Structures
Author: Jin JiangPublisher: John Wiley & Sons
ISBN: 3527831843
Category : Technology & Engineering
Languages : en
Pages : 245
Book Description
Welded High Strength Steel Structures Understand the impact of fatigue on high strength steel joints with this comprehensive overview High strength steels are highly sought after for industrial and engineering applications ranging from armored vehicles to welded engineering components built to withstand considerable stress. The mechanical properties of welded joints made from high strength steel are integrally linked to the specific welding process, which can have an enormous impact on fatigue performance. Welded High Strength Steel Structures: Welding Effects and Fatigue Performance provides a comprehensive analysis of high strength steel joints and the ramifications of the welding process. It guides readers through the process of performing thermal analysis of high strength steel structures and evaluate fatigue performance in the face of residual stress. The result is a volume with innumerable use cases in engineering and manufacture. Welded High Strength Steel Structures readers will also find: An author with decades of experience in research and engineering Numerous studies of various classes of high strength steel joints Studies on tubular structures for welding residual stress Welded High Strength Steel Structures is a must-own for welding specialists, materials scientists, mechanical engineers, and researchers or industry professionals in related fields.
Author: Paul Laws