Microstructural Evolution with a Wide Range of Solidification Cooling Rates in a Ni-Based Superalloy

Zhang, Yongjun; Bin, Huang; Li, Jianguo

doi:10.1007/s11661-013-1645-7

Cited by 50 publications

(18 citation statements)

References 9 publications

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“…In addition, the dendritic arm spacing tends to become larger with the decrease of the cooling rate. Such increase in spacing may result in the decline of the hardness [27,28]. It can be seen from Figure 5b-g that the dendritic arm spacing increases greatly from the bottom to top region, which has good agreement with the theory mentioned above.…”

Section: Microstructure and Hardnesssupporting

confidence: 74%

Characterization of Microstructure and Mechanical Properties of Stellite 6 Part Fabricated by Wire Arc Additive Manufacturing

Cui

Wang³

et al. 2019

Metals

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Stellite 6 alloy has excellent wear resistance, corrosion resistance, and oxidation resistance, however the difficulties in traditional processing limit its wide application. Additive manufacturing technology that has emerged in recent years is expected to provide a new way for the processing of stellite 6 alloy. In this study, two square thin-walled stellite 6 parts were fabricated through the wire arc additive manufacturing technology. At the same time, the effect of stress relief annealing on the mechanical performance of the fabricated stellite 6 part was studied and compared with the corresponding casting part. The results indicate that the additive manufacturing stellite 6 components exhibit satisfactory quality and appearance. Moreover, the microstructure of the additive manufacturing part is much finer than that of the casting part. From the substrate to the top region of the additive manufacturing part, the morphology of the dendrites changes from columnar to equiaxed, and the hardness increases firstly and then decreases gradually. In addition, the average hardness of the additive manufacturing part is ~7–8 HRC higher than the casting part. The ultimate tensile strength and yield strength is ~150MPa higher than the casting part, while the elongation is almost the same. The stress relief annealing has no significant effect on the hardness of the AM part, but it can slightly improve the strength.

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Section: Microstructure and Hardnesssupporting

confidence: 74%

Characterization of Microstructure and Mechanical Properties of Stellite 6 Part Fabricated by Wire Arc Additive Manufacturing

Cui

Wang³

et al. 2019

Metals

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“…Similar results were also reported in the earlier works [1,[5][6][7][8][16][17][18][19][20]. The trendline equation:…”

Section: Resultssupporting

confidence: 88%

“…Secondly, a higher temperature gradient and cooling rate shorten the length of the solid-liquid phase zone, so that solidification time decreases and consequently solidification rate increases [15,16]. Moreover, the coarsening time of secondary dendrite arm spacing is shortened at higher cooling rate, so finer secondary dendrite arm spacing is obtained [17]. In Fig.…”

Section: Resultsmentioning

confidence: 98%

Effect of solidification parameters on the secondary dendrite arm spacing in MAR M-247 superalloy determined by a novel approach

Milenković

Rahimian

Sabirov

et al. 2014

MATEC Web of Conferences

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Abstract. The effect of solidification parameters on the secondary dendrite arm spacing in a MAR-M247 Nibased superalloy has been studied by a novel approach, based on physical simulation of melting/solidification experiment with a constant cooling rate and variable temperature gradient. The applied experimental method proved to be efficient as it yielded a spread of microstructures corresponding to a range of well controlled solidification rates in a single melting/solidification experiment. In addition, it has been demonstrated that secondary dendrite arm spacing is better related to the solidification rate than to the cooling rate in the case when significant variations of thermal parameters during the solidification process occur.

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“…Секция 10. Аддитивные технологии формирования материалов, изделий и элементов конструкций с иерархически организованной структурой DOI: 10.17223/9785946219242/345 ОБ ОСОБЕННОСТЯХ НАПРАВЛЕННОЙ СТРУКТУРЫ И ФАЗОВОГО СОСТАВА МАТЕРИАЛА АДДИТИВНЫХ ИЗДЕЛИЙ ИЗ НИКЕЛЕВОГО СУПЕРСПЛАВА 1 Фортуна С.В., 1,2 Гурьянов Д.А., 1 Никонов С.Ю., 1 Иванов К.В. 1 Институт физики прочности и материаловедения СО РАН, Томск 2 НИ Томский политехнический университет, Томск…”

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“…Повышение температурного градиента не только уменьшает расстояние между осями дендритов первого порядка [1], тем самым способствуя направленному росту, но и уменьшает объемную долю осей второго порядка. Что в свою очередь приводит к уменьшению сегрегации в междендритном пространстве [2].…”

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OB OSOBENNOSTJaH NAPRAVLENNOJ STRUKTURY I FAZOVOGO SOSTAVA MATERIALA ADDITIVNYH IZDELIJ IZ NIKELEVOGO SUPERSPLAVA

2020

Mezhdunarodnaya Konferentsiya "Fizicheskaya Mezomekhanika. Materialy S Mnogourovnevoy Ierarkhicheski Organizovannoy Strukturoy

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Microstructural Evolution with a Wide Range of Solidification Cooling Rates in a Ni-Based Superalloy

Cited by 50 publications

References 9 publications

Characterization of Microstructure and Mechanical Properties of Stellite 6 Part Fabricated by Wire Arc Additive Manufacturing

Characterization of Microstructure and Mechanical Properties of Stellite 6 Part Fabricated by Wire Arc Additive Manufacturing

Effect of solidification parameters on the secondary dendrite arm spacing in MAR M-247 superalloy determined by a novel approach

OB OSOBENNOSTJaH NAPRAVLENNOJ STRUKTURY I FAZOVOGO SOSTAVA MATERIALA ADDITIVNYH IZDELIJ IZ NIKELEVOGO SUPERSPLAVA

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