Fracture Toughness of Hydrogen Embrittled Welds and Heat Affected Zones in Stainless Steel PDF Download

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ISBN:
Category :
Languages : en
Pages : 1

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Author: P. A. Kammer
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 132

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Book Description
Weldment cracking is a broad complex field. Even if one considers only cracking of steel weldments, the problems range from cracking at temperatures near the solidus during welding to cracking at room temperature days, weeks, or months after welding is completed. Numerous reports of investigations in this field are contained in the published and unpublished literature. However, most of these reports cover only a particular problem in a specific area of the broad field of weldment cracking. This review attempts to cover the major aspects of the entire field of weldment cracking. Necessarily, the review is for the most part general, only being specific in a few instances to illustrate a point. (Author).

Author: Thomas Böllinghaus
Publisher: Springer
ISBN: 3319284347
Category : Technology & Engineering
Languages : en
Pages : 502

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Book Description
This is the fourth volume in the well-established series of compendiums devoted to the subject of weld hot cracking. It contains the papers presented at the 4th International Cracking Workshop held in Berlin in April 2014. In the context of this workshop, the term “cracking” refers to hot cracking in the classical and previous sense, but also to cold cracking, stress-corrosion cracking and elevated temp. solid-state cracking. A variety of different cracking subjects are discussed, including test standards, crack prediction, weldability determination, crack mitigation, stress states, numerical modelling, and cracking mechanisms. Likewise, many different alloys were investigated such as aluminum alloys, copper-aluminum dissimilar metal, austenitic stainless steel, nickel base alloys, duplex stainless steel, creep resistant steel, and high strength steel.

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Category :
Languages : en
Pages : 15

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The effects of hydrogen on the fracture toughness properties of upset welded Type 304L stainless steel were measured and compared to those measured previously for as-received and as-welded steels. The results showed that the upset welded steels had good fracture toughness properties, but values were lower than the as-received material. The fracture toughness value of the base material was 6420 in-lbs/sq. in., while the welded steels averaged 3660 in-lbs/sq. in. Hydrogen exposure lowered the fracture toughness values of the as-received steel by 43 % to 3670 in-lbs/sq. in. and the welded steels by 21 % to 2890 in-lbs/sq. in. The fracture morphologies of the unexposed steels showed that ductile fracture occurred by the microvoid nucleation and growth process. The size of the microvoids on the fracture surfaces of the welded steels were much smaller and more closely spaced that those found on the base material fracture surfaces. The change in the size and spacing of the microvoids indicates that the fracture toughness properties of the welded steels were lower than the base steels because of the higher concentration of microscopic precipitates on the weld plane. The welds examined thus far have been {open_quotes}good{close_quotes} welds and the presence of these precipitates was not apparent in standard {open_quotes}low{close_quotes}-magnification metallographic sections of the weld planes. The results indicate that hydrogen did not weaken greatly the solid-state welds but that other inclusions or impurities present prior to welding did. Improvements in surface cleaning and preparation prior to welding should be explored as a way to improve the strength of solid-state welded joints.

Author: K. G. Richards
Publisher:
ISBN:
Category : Steel
Languages : en
Pages : 36

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Author: Alexander Robert Troiano
Publisher: ASM International
ISBN: 9781615031788
Category : Technology & Engineering
Languages : en
Pages : 356

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Author: Welding Research Council (U.S.)
Publisher:
ISBN:
Category : Welding
Languages : en
Pages : 520

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Author: J. F. Lancaster
Publisher: Woodhead Publishing
ISBN: 9781855733435
Category : Technology & Engineering
Languages : en
Pages : 452

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Book Description
This handbook provides a comprehensive analysis of the current state of welding technology as applied to large structures and process plant. The author takes account of the increasing necessity for engineers at all levels to be aware of problems such as fatigue failure and provides advice.

Author: SJ. Garwood
Publisher:
ISBN:
Category : Bend tests
Languages : en
Pages : 27

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Book Description
This paper comprises a study of the resistance to the propagation of a ductile tear in 316 stainless steel parent plate in all six orientations, and submerged-arc and manual metal arc weld metal and heat-affected zone (HAZ) regions in stainless weldments at 370 and 540°C. Tests were carried out in bending and tension in both load and displacement control at 370°C. The propagation resistances of the various regions are assessed from the measurement of resistance curves and maximum load toughness using both crack tip opening displacement (CTOD) and J-integral parameters.

Author: J. F. Lancaster
Publisher: Elsevier
ISBN: 1845694864
Category : Technology & Engineering
Languages : en
Pages : 451

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Book Description
A new edition of a well established and respected textbook from an author who is a recognised authority in this field. Joining techniques are one of the key technologies in materials engineering and this book provides comprehensive coverage of the subject. It is intended for undergraduate and graduate students of metallurgy, as well as those attending specialist welding courses.It is also a valuable source of reference for practising engineers and metallurgists concerned with joining processes. The text covers the metallurgical changes that take place during the welding process, the properties of welded joints, defects associated with welding and the behaviour of welded joints in service. There is a chapter devoted to joints between metals and ceramics, and on the use of structural adhesives. The various techniques used in microwelding and the joining of solid-state devices to printed circuit boards are briefly described.In addition to revising and updating the text throughout the author has made some specific alterations and additions to the book: - Brittle and ductile behaviour of solids, ductile francture, and the velocity of crack propogation are now included in the section on Fracture; - Friction stir welding in now included; - There is an additional chapter on adhesive bonding which includes bonding; - forces, polymer chemistry, types of adhesive, production technology, quality control and applications; - The section on heat flow has been expanded and includes worked examples; - A section on weld defects and the evaluation of non-destructive tests has been added; - A section on the welding metallurgy of aluminium-lithium alloys has been added; - A new section describes major structural failure in such catastrophes as the 'Alexander L Kielland' accident and the Kobe earthquake, and considers the role of welding in such failures.