Void nucleation behavior of single-crystal high-purity iron specimens subjected to tensile deformation

Furukimi, Osamu; Chatcharit, Kiattisaksri; Takeda, Yoichi; Aramaki, Masatoshi; Oue, Satoshi; Munetoh, Shinji; Tanaka, Masaki

doi:10.1016/j.msea.2017.06.084

Cited by 21 publications

(2 citation statements)

References 11 publications

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“…The high-purity iron obtained through these processes has good ductility, , soft magnetic properties, electrical conductivity, heat transfer properties, and corrosion resistance at purity greater than 3N due to the substantial increase in purity . For example, when the amounts of impurity elements, such as C, N, P, and S, are reduced to the limit, tensile dislocations do not accumulate at grain boundaries, propagating by crossover and other means, leading to polycrystalline deformation and exhibiting great elongation at room and high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Research Progress and Trends in Iron Metal Purification Processes

Tan

Yang

Tian

et al. 2023

Ind. Eng. Chem. Res.

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Traditional industrial pure iron can no longer meet the requirements of many core industries, such as aerospace, electronic information, and military industries. Thus, high-purity iron has attracted considerable interest. Pyrometallurgy, hydrometallurgy, and electrometallurgy provide extensive research platforms for purifying and developing novel processes for producing high-purity iron. In this paper, we review latest research advances in high-purity iron purification methods and production processes and summarize the merits of each purification method. Moreover, we propose a production process that ensures the production of high-purity iron while reducing carbon emissions. In this process, iron ore is leached using a hydrometallurgical process, high-purity iron is obtained by electrolysis from clean energy sources, such as photovoltaics and wind power, and the purity of iron is increased to over 5N with a pyrometallurgy process.

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Section: Introductionmentioning

confidence: 99%

Research Progress and Trends in Iron Metal Purification Processes

Tan

Yang

Tian

et al. 2023

Ind. Eng. Chem. Res.

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“…The effect of plastic pre-strains is an important factor in failure of austenitic steels even without hydrogen. 9,10) In particular, the formation and growth of cracks and voids can result from the accumulation of lattice defects, such as vacancies, 11,12) dislocations, 13,14) and twins, 15,16) which reduces the stress accommodation capability and creates a microstructural crack growth path. In addition, plasticity-induced damage can act together with hydrogen effects.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen-assisted Crack Propagation in Pre-strained Twinning-induced Plasticity Steel: from Initiation at a Small Defect to Failure

et al. 2021

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Hydrogen-assisted crack growth of pre-strained twinning-induced plasticity (TWIP) steel was investigated using artificial defects (micro-drilled holes), which acted as artificial crack initiation sites. Hydrogen was introduced into the specimens by electrochemical hydrogen charging during slow strain rate tensile test. The quasi-cleavage crack propagation observed was due to repeated crack initiation near the crack tip and subsequent coalescence. Crack initiation near the crack tip occurred after plastic deformation of the crack tip, and pre-straining facilitated plasticity-driven crack initiation. The early stage of plasticity-driven crack growth was sensitive to the crack length and remote stress level. Accordingly, the crack growth rate in the early stage increased with the increase in the initial defect size. In the following stage of the crack growth, the crack growth rate exhibited a complicated trend with respect to the crack length, which is possibly due to the plastic-wake-altered stress field around the crack tip, which depends on the initial defect size.

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