Effects of phosphorus segregation on stress corrosion cracking in the heat-affected zone of a dissimilar weld joint between a Ni-base alloy and a low alloy steel

Zhai, Ziqing; Abe, Hiroshi; Miyahara, Yuto; Watanabe, Yutaka

doi:10.1016/j.corsci.2014.10.037

Cited by 24 publications

(3 citation statements)

References 37 publications

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“…The change in the heat‐treated systems leads to a difference in the local corrosion performance of the Al alloy, mainly by affecting the shape of the structure, the distribution of the precipitated phase, the density alloy, and the size. In the natural‐aged alloy, the microstructure is mainly the Cu‐atom segregation zone (GP zone), no other phase precipitated in the crystal (Figure a), demonstrating the crystal's better resistance to intergranular and exfoliation corrosion. When the alloy was aged at 160°C for 24 hr (underaged state), a small amount of short, needle‐like T 1 phase precipitated in the grain boundary and subgrain boundary (Figure b), and the alloy exhibited no obvious grain boundary and no PFZ.…”

Section: Discussionmentioning

confidence: 99%

Effect of different aging processes on the corrosion behavior of new Al–Cu–Li–Zr–Sc alloys

Peng

Pan

Cai

et al. 2019

Materials & Corrosion

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The intergranular corrosion and exfoliation corrosion behaviors of Al-Cu-Li-Zr-Sc alloys under different aging effects, such as single-stage aging, strain aging, and double-stage aging, were studied. Among the three aging treatments, single-stage aging resulted in the best resistance to corrosion, followed by double-stage aging; strain aging resulted in the worst corrosion resistance. A 3.5% precooling strain could increase the dislocation density, which promoted the precipitation of corrosion-prone T 1 phase and increased the corrosion driving force of the alloy. Double-stage aging made the precipitated T 1 phases finer and more uniform and reduced the number of equilibrium phases at grain boundaries, thus improving the corrosion properties of the alloy. The corrosion susceptibility of the alloy was attributed to the T 1 phase and precipitate-free zone (PFZ), and the underlying corrosion mechanism was revealed as preferential dissolution of the equilibrium phase at grain boundaries and its surrounding distortion zone, followed by expansion of the PFZ along the grain boundaries, resulting in the development of corrosion from the grain boundaries to the intragranular regions. K E Y W O R D SAl-Cu-Li alloys, corrosion, double-stage aging, single-stage aging, strain aging

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Section: Discussionmentioning

confidence: 99%

Effect of different aging processes on the corrosion behavior of new Al–Cu–Li–Zr–Sc alloys

Peng

Pan

Cai

et al. 2019

Materials & Corrosion

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“…Andrieu et al [29] argued that phosphorus in the grain boundary could affect the resistance to grain boundary fracture and thus facilitate cleavage crack propagation from one grain to the next one. Zhaia et al [30] suggested that twinned crystals formed readily with the increase of phosphorus content and hardness, which also induced a corresponding increase in the…”

Section: Microstructure and Microhardness Analysismentioning

confidence: 98%

A study of the mechanism of delamination fracture in bainitic magnetic yoke steel

Tao

Yan

et al. 2016

Materials & Design

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“…[7,8] However, high-phosphorus content has harmful effects in austenitic stainless steel, including stress corrosion cracking and weld hot cracking. [9][10][11] Therefore, reducing the precipitation of phosphide at grain boundaries is one of the key factors that improve the properties of stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Effects of Electric Current Pulse Treatment on Phosphide Precipitation Behavior in 304 Stainless Steel

Jia

Zhong

et al. 2023

steel research int.

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The precipitation behavior of phosphides in melting and solidification of 304 stainless steel under treatment using an electric current pulse (ECP) is studied. The composition and crystal structure of phosphides are confirmed and analyzed via scanning electron microscope and transmission electron microscope (TEM). The results show that the phosphides are composed of Cr, Mn, S, and P in the sample that is quenched at 1773 K without ECP treatment. From the high-resolution TEM images and selected area electron diffraction, the crystal lattice structure of phosphides is the same as that of Cr 3 P. Mn and S replace some of the Cr and P in the Cr 3 P lattice because of the replacement solution. Phosphides are hardly detected in the samples that are treated using ECP. ECP treatment inhibits the formation of Cr 3 P. Phosphide is mainly presented in the form of CrP 4 in the samples that are quenched at 1583 K, which contain a large number of nanoaustenite grains. Meanwhile, ECP treatment inhibits the growth of phosphides because of differences in the conductivity between molten steel and phosphides during solidification. The size of phosphides decreases with an increase in current density.

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Effects of phosphorus segregation on stress corrosion cracking in the heat-affected zone of a dissimilar weld joint between a Ni-base alloy and a low alloy steel

Cited by 24 publications

References 37 publications

Effect of different aging processes on the corrosion behavior of new Al–Cu–Li–Zr–Sc alloys

Effect of different aging processes on the corrosion behavior of new Al–Cu–Li–Zr–Sc alloys

A study of the mechanism of delamination fracture in bainitic magnetic yoke steel

Effects of Electric Current Pulse Treatment on Phosphide Precipitation Behavior in 304 Stainless Steel

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