Thomas Wilson's Sonatina

Dawes, Frank

doi:10.2307/953693

Cited by 26 publications

(32 citation statements)

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“…M ϭ / c [2] In a homogeneously hard joint, such as a SHTA weld, a fracture was located in a region with a minimum average The c is shear stress working on the active slip systems.…”

Section: B Fracture Locationmentioning

confidence: 99%

“…[1][2][3][4] The process reduces manufacpresent authors [15,16] have systematically examined microturing costs due to the elimination of some defects, filler structures associated with hardness profiles in a friction stir materials, shielding gases, and costly weld preparation. [1,2,3] weld of precipitation-hardened 6063-T5 Al with a thickness Furthermore, friction stir welds of aluminum (Al) alloys of 6 mm. The friction stir weld of 6063 Al was found to be exhibit better tensile, bend, and fatigue properties than fusion softened around the weld center.…”

Section: Introductionmentioning

confidence: 99%

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Distribution of tensile property and microstructure in friction stir weld of 6063 aluminum

Sato

Kokawa

2001

Metall Mater Trans A

282

115

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Dominant microstructural factors governing the global tensile properties of a friction-stir-welded joint of 6063 aluminum were examined by estimating distribution of local tensile properties corresponding to local microstructure and hardness. Yield and ultimate tensile strengths of the as-welded weld were significantly lower than those of the base material. Postweld aging and postweld solution heattreatment and aging (SHTA) restored the strengths of the weld to the levels of the base material. Elongation was found to increase with increasing strength. Hardness tests showed that the as-welded weld was soft around the weld center and that the aged weld and the SHTA weld had relatively homogeneous distributions of high hardness. Hardness profiles of the welds were explained by precipitate distributions and precipitation sequences during the postweld heat treatments. The strengths of the welds were related to each minimum hardness value. In a weld having a heterogeneous hardness profile, the fracture occurred in the region with minimum hardness. When a weld had a homogeneous hardness profile, its fracture site depended on both crystallographic-orientation distribution of the matrix grains and strain tensor of the imposed deformation, i.e., it fractured in the region with a minimum average Taylor factor.

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“…M ϭ / c [2] In a homogeneously hard joint, such as a SHTA weld, a fracture was located in a region with a minimum average The c is shear stress working on the active slip systems.…”

Section: B Fracture Locationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution of tensile property and microstructure in friction stir weld of 6063 aluminum

Sato

Kokawa

2001

Metall Mater Trans A

282

115

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“…2). FW is characterized by a lower heat input than the one required for various fusion-welding techniques such as gas tungsten arc welding, laser welding, and electron beam welding, and thus suppresses the formation of potential weld defects as discussed above [11][12][13] . In addition, welding joint defects such as voids and cracks are rarely formed due to the friction and upset forces, while oxide and carbide species are almost never produced during welding because FW is a solid-state process 17) .…”

Section: Resultsmentioning

confidence: 99%

“…Friction welding (FW), which is used to weld two materials in the solid state, can signi cantly affect their microstructures and mechanical properties due to its lower heat input as compared to fusion welding techniques [11][12][13] . In particular, FW suppresses the generation of harmful gases and is characterized by a lower consumption of electrical power during the welding procedure, which made limelight a green process 14) .…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Friction-Welded A6063 and A2017 Alloys

2017

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The microstructures and mechanical properties of lightweight friction-welded dissimilar materials such as A6063 and A2017 alloy rods were investigated in this study. Friction welding was performed at a rotation speed of 2,000 RPM, friction load of 12 kgf/cm 2 , and upset force of 25 kgf/cm 2 . After welding, grain boundary characteristic distributions and the formation of intermetallic compounds were analyzed by electron backscattering diffraction and transmission electron microscopy, respectively, while the mechanical properties of the welded materials were studied by Vickers microhardness and tensile testing. The obtained results revealed that the friction welding of the two alloys led to signi cant grain re nement from around 50 μm for the base materials to 2 μm for the welded zone, while the Vickers microhardness and tensile strength of the welded area were equal to 81% and 96% of the corresponding values for the base materials, respectively, owing to the formation and growth of intermetallic compounds. However, the fracture initiated in the A6063 base material during tensile testing indicated superior quality of the welded joint. Therefore, friction welding of dissimilar materials can be effectively used to produce joints with high durability.

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“…The heat-treated cable and indium sheets as fillers were embedded in the grooved aluminum-alloy jacket. The jacket cover was then welded by friction stir welding [4,5], which does not damage the cable. The I c of the straight conductor was measured to be approximately 11 kA at 7 T and 9 kA at 8 T [1].…”

Section: Introductionmentioning

confidence: 99%

Effect of Bending on Critical Current and n-Value of React-and-Jacket Processed Nb<sub>3</sub>Sn Conductor

Takahata

Tamura

Mito

et al. 2013

Plasma and Fusion Research

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A "react-and-jacket" processed Nb 3 Sn conductor consisting of a Rutherford cable and aluminum-alloy jacket has been developed for fusion magnets. This study investigates the effect of bending on the critical current and the n-value of this conductor, which has a cross-section of 17 × 4.9 mm 2 . The conductor was wound in a three-turn coil and its critical current was measured in a superconducting magnet. The degradation of the critical current and the n-value due to the bending strain were assessed using an empirical formula for the strain dependence.

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Thomas Wilson's Sonatina

Cited by 26 publications

References 0 publications

Distribution of tensile property and microstructure in friction stir weld of 6063 aluminum

Distribution of tensile property and microstructure in friction stir weld of 6063 aluminum

Microstructure and Mechanical Properties of Friction-Welded A6063 and A2017 Alloys

Effect of Bending on Critical Current and n-Value of React-and-Jacket Processed Nb<sub>3</sub>Sn Conductor

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