Iron, Ultrahigh-purity

Abiko, K.

doi:10.1016/b0-08-043152-6/01832-5

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…Average values are also illustrated in Figures 6 to 8. 3 IMR-TU provided raw test data to NIST, who analyzed the tests and calculated the results.…”

Section: Imr-tu Resultsmentioning

confidence: 99%

“…It was obtained by use of an induction melting furnace, located at IMR-TU in Sendai (Japan). The furnace is capable of melting iron ingots up to 10 kg, and its main chamber can be evacuated to a base pressure of 6.7 × 10 -8 Pa. UHP Fe is used for the fundamental research on the intrinsic properties of iron and to determine the inherent effects of each impurity [1][2][3].…”

Section: Round-robin Descriptionmentioning

confidence: 99%

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Tensile Properties of Commercially Pure, High Purity and Ultra High Purity Iron: Results of an International Round-Robin

Lucon¹,

Abiko²,

Lambrecht³

et al. 2015

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The room temperature tensile properties of iron with different purity levels (commercially pure, high-purity, and ultra-high-purity) were characterized at different strain rates in the framework of an international Round-Robin involving four laboratories (BAM, IMR-TU, NIST, and SCK•CEN). The test results were collected and analyzed by NIST, and are presented in this Technical Note. Data from all the participating laboratories were found in good agreement, thus allowing a clear assessment of the influence of strain rate and purity level on tensile properties (mechanical resistance and ductility). A clear increase of yield strength and, to a lesser extent, tensile strength was observed for all materials as strain rate increases and purity level decreases. The highest strain rate sensitivity was associated with the highest purity level (ultra-high-purity Fe). Ductility trends were less unequivocal, but typically an increase of elongation at fracture and reduction of area was detected as strain rate and purity level increase. Significant differences in tensile properties were observed between the two investigated types of high-purity Fe, which can be attributed to an influence of the production process in terms of melting environment (atmosphere and crucible), as well as differences in chemical compositions.

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“…Average values are also illustrated in Figures 6 to 8. 3 IMR-TU provided raw test data to NIST, who analyzed the tests and calculated the results.…”

Section: Imr-tu Resultsmentioning

confidence: 99%

Section: Round-robin Descriptionmentioning

confidence: 99%

Tensile Properties of Commercially Pure, High Purity and Ultra High Purity Iron: Results of an International Round-Robin

Lucon¹,

Abiko²,

Lambrecht³

et al. 2015

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“…However, a small fraction of carbon (∼0.1 wt-%) in the form of interstitial-solute can create a ‘Cotrell-Atmosphere’ due to the solute mobility during low-temperature annealing. 33 Hence, the interstitial solutes may pin down the dislocations during deformation and mechanical testing. This should cause increased resistance for the dislocation motion.…”

Section: Discussionmentioning

confidence: 99%

“…However, a small fraction of carbon (∼0.1 wt-%) in the form of interstitial-solute can create a 'Cotrell-Atmosphere' due to the solute mobility during low-temperature annealing. 33 Hence, the interstitial…”

Section: Data Availability Statementmentioning

confidence: 99%

Role of δ-phase on recrystallisation behaviour of Inconel 718

Padasale,

Potphode,

D’silva

et al. 2024

Materials Science and Technology

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The present work investigates the annealing behaviour of prior-coldworked Inconel 718 (IN718) sheets over wide reduction and temperature ranges by performing cold-rolling and isothermal annealing, followed by mechanical testing and structural characterisation. The study reveals that, with increasing annealing temperature, the prior-coldworked alloy shows non-monotonic M-Type variation with double peak-hardening at 0.3 Tm and 0.6 Tm. The study discovers that the first peak is due to the ‘static–strain–aging phenomenon’ that precedes recovery-softening. The second peak-hardening is due to precipitation-hardening, following which, the alloy softens due to recrystallisation. Supported by SEM, electron back-scattered diffraction and X-Ray diffraction results, the investigation suggests that the precipitation of fine rod-shaped δ-phase creates numerous nucleation sites at the shear bands that cause recrystallisation-burst at 0.75 Tm. However, above 0.75 Tm absence of the δ-phase activates grain-boundary migration resulting in rapid grain-coarsening.

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