Comparative study on the high-temperature tensile and creep properties of Alloy 617 base and weld metals

Kim, Woo‐Gon; Park, Jae Young; Ekaputra, I.M.W.; Hong, Sung-Deok; Kim, Seon-Jin; Kim, Yong‐Wan

doi:10.1007/s12206-013-0616-7

Cited by 25 publications

(8 citation statements)

References 7 publications

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“…After welding process, the soundness of the weldments was evaluated by ultrasonic, tensile, and bending tests. The details of the welding procedure are shown in [1].…”

Section: Methodsmentioning

confidence: 99%

“…The tensile test specimens were machined into a rectangular cross section with a gage length of 28.5 mm, width of 6.25 mm, and thickness of 1.5 mm. Further details of the tensile test preparation can be found in [1]. Figure 3 shows the stress-strain curves for BM and weldment specimens.…”

Section: Tensile Properties and Cyclic Stress Responsementioning

confidence: 99%

“…In addition to its high temperature strength, it also has excellent resistance to wide range of corrosive environments and is readily formed and welded by conventional techniques. For this reasons, Alloy 617 is considered as one of the leading candidates because of its highest allowable design stress compared to other superalloys for construction of the IHX associated with the reformer system [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…In mechanical structures, the welded components are unavoidable and some of the components were joined by various welding techniques. Moreover, the welded joints are more brittle than the base metal and may have several original defects [1]. In addition, the welded joints are microstructurally and mechanically heterogeneous, which could form one of the potential sites 2 Advances in Materials Science and Engineering of the fatigue failure.…”

Section: Introductionmentioning

confidence: 99%

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Cyclic Stress Response and Fracture Behaviors of Alloy 617 Base Metal and Weld Joints under LCF Loading

Kim

Dewa

Kim

et al. 2015

Advances in Materials Science and Engineering

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Cyclic stress response and fracture behaviors of Alloy 617 base metal (BM) and Alloy 617 weld joints (WJ) are investigated under strain controlled low cycle fatigue (LCF) loading. Axial fully reversed total-strain controlled tests have been conducted at room temperature with total strain ranges of 0.6, 0.9, 1.2, and 1.5%. At the all testing conditions, weld joint specimens have shown higher peak stresses than the base metal specimens, whereas the plastic strain accumulation of the base metal specimens is comparatively higher than those of the weld joint specimens. The cyclic stress response behavior of both base metal and weld joint specimens revealed initial cyclic hardening during first small number of cycles followed by progressive softening to failure. Higher strain amplitudes decreased the fatigue lives for both base metal and weld joint specimens; subsequently weld joint specimens had lower fatigue resistances relative to base metal specimens. Furthermore, the cracking in weld joint specimens initiated in the weld metal (WM) region. The crack initiation and propagation showed transgranular mode for both base metal and weld joint specimens; especially weld joint specimens showed a wedge type crack initiation about 45 degrees to the loading direction because of the dendritic structure.

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“…After welding process, the soundness of the weldments was evaluated by ultrasonic, tensile, and bending tests. The details of the welding procedure are shown in [1].…”

Section: Methodsmentioning

confidence: 99%

Section: Tensile Properties and Cyclic Stress Responsementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cyclic Stress Response and Fracture Behaviors of Alloy 617 Base Metal and Weld Joints under LCF Loading

Kim

Dewa

Kim

et al. 2015

Advances in Materials Science and Engineering

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show abstract

“…Of the existing alloys, nickel-based Alloy 617 is the leading candidate for use in VHTR heat exchangers because it has been reported to have the highest creep allowable stress compared with other potential superalloys under consideration for 10 5 h at 898°C, as shown in Fig. 1 [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%