Weld Crackling in Submarine Steels

Adams, C. M.

doi:10.21236/ad0604985

Cited by 5 publications

(6 citation statements)

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“…4 There is some evidence that high joint ef®ciencies can be achieved with lower heat input, particularly when weldments are aged directly after welding. 5 It has been suggested that the ®ner dendritic structures of low heat input welds respond more readily to direct post-weld aging. Although the strength of the welds is thus close to that of the parent material, there has been concern that the ductility is often reduced by welding, which has sometimes been ascribed to segregation of titanium sulphide to crystal boundaries in the weldment.…”

Section: Introductionmentioning

confidence: 99%

“…Although the strength of the welds is thus close to that of the parent material, there has been concern that the ductility is often reduced by welding, which has sometimes been ascribed to segregation of titanium sulphide to crystal boundaries in the weldment. 5 The subject of fracture toughness of maraging steels has received considerable attention and the in¯uence of several factors such as solution treatment temperature, prior austenite grain size, composition, and the parameters of the aging treatment have been examined in detail. It has been observed, for example, that some improvement in fracture toughness of aged specimens could be achieved by solution treating above 1000³C (instead of above 800³C) and water quenching (instead of air cooling).…”

Section: Introductionmentioning

confidence: 99%

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Tensile properties and fracture toughness of 18Ni (250 grade) maraging steel weldments

Shamantha

Narayanan

Iyer

et al. 2000

Science and Technology of Welding and Joining

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Gas tungsten arc welding was performed on 18Ni (250 grade) maraging steel sheet using two different ®ller wires: one of the same composition as the base material and the other containing more cobalt and aluminium and less molybdenum and titanium. Weld specimens were then aged under four different sets of conditions. After metallographic characterisation, mechanical properties including hardness, tensile strength and ductility, and fracture toughness were evaluated. Results showed that use of the matching ®ller material led to lower strength but higher ductility than in the other case; this was attributed to the presence of reverted austenite in the former (caused by segregation, especially of molybdenum) at the fusion zone substructure boundaries. In both types of weld metal, a re-solution treatment followed by aging at 480³C resulted in optimum tensile properties. Fracture toughness of the aged weldments was in general close to that of the parent material aged at 480³C; some deterioration occurred only when welds with pronounced segregation were made at high temperature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tensile properties and fracture toughness of 18Ni (250 grade) maraging steel weldments

Shamantha

Narayanan

Iyer

et al. 2000

Science and Technology of Welding and Joining

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“…ESPN was founded in 1979 and has since become one of the world’s most popular brands (Forbes, 2016). ESPN’s current brand value is estimated at US$16.9 billion and they pay an estimated US$1.9 billion annually for NFL broadcast rights (Travis, 2016). As one of the most profitable and popular, the network charges cable distributors almost 4 times as much as all other networks for each subscriber each month (Fahey, 2016).…”

Section: Literature Reviewmentioning

confidence: 99%

ESPN’s Coverage of Intimate Partner Violence in the National Football League

Spencer

Limperos

2018

Communication & Sport

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On September 8, 2014, a graphic video showing Ray Rice punch and render his fiancée unconscious was released to the public. This event was a catalyst for discussion into how the media cover intimate partner violence (IPV) committed by National Football League (NFL) players. Media frames can shape the way audiences make sense of an issue. As the “Worldwide Leader in Sports,” Entertainment and Sports Programming Network (ESPN) has a journalistic responsibility to frame and address sociocultural issues related to sports, especially those involving crime, health, and safety. IPV is a pervasive sociocultural issue affecting millions of people in the United States, and media frames can shape the way audiences understand the subject matter and the themes surrounding IPV. This research used qualitative textual analysis to examine ESPN’s website coverage of IPV incidents committed by NFL players 2 years prior to and after the Ray Rice incident. Our findings show that instances of IPV were more episodically than thematically framed before the Ray Rice incident. Framing of IPV was revealed in four themes: focus on the individual player, problem for the team, the NFL’s problem, and missing the point. Further analysis and theoretical and practical implications are discussed.

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“…When a tunable laser is used to resonantly excite an atomic species, the laser-induced excited atom population obviously has a lower effective ionization potential than the ground-state population and is more readily ionized by thermal collisions. This process and several variations constitute the basis of the optogalvanic effect in flames (1), or laser-enhanced ionization (LEI) (2)(3)(4)(5)(6)(7).…”

Section: Ionization Spectrometrymentioning

confidence: 99%

Laser-Enhanced Ionization Spectrometry

1982

Anal. Chem.

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Weld Crackling in Submarine Steels

Cited by 5 publications

References 0 publications

Tensile properties and fracture toughness of 18Ni (250 grade) maraging steel weldments

Tensile properties and fracture toughness of 18Ni (250 grade) maraging steel weldments

ESPN’s Coverage of Intimate Partner Violence in the National Football League

Laser-Enhanced Ionization Spectrometry

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