Quantitative analysis of homogenization treatment of INCONEL718 superalloy

Miao, Zhongchen; Shan, Aidang; Wu, Yunxiang; Lü, Jun; Xu, Wen‐Liang; Song, Hongwei

doi:10.1016/s1003-6326(11)60814-5

Cited by 68 publications

(16 citation statements)

References 7 publications

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“…One of the most important goals of homogenization is to remove the Laves phase in Inconel 718 alloy . On‐heating curve illustrated in Figure shows similar melting sequence as other references: the melting of lumpy Laves phase (P‐1), then followed by carbides (P‐2), and finally by primary γ matrix (P‐3). Based upon the heating curve, the initial melting temperature of Laves phase decreases about 15° for No.…”

Section: Resultssupporting

confidence: 71%

“…2 alloy decreases by nearly 80% compared to blank alloy, indicating that V microalloying may prevent the precipitation of such intermetallic phase. Miao et al investigated homogenization effect of two‐stage heat treatment on Inconel 718 alloy; in which the first stage is meant to precisely remove Laves phase. Lower LPVF value would reduce homogeneration difficulty during heat treatment.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, for the as‐cast ingot, δ = 1, and the value will decrease with homogenization treatment performed. According to Miao et al, a more simplified equation for δ is given, viz.,

\ln δ = - \frac{4 {normalπ}^{2}}{{normalL}^{2}} D t

where L is the SDAS (cm), D is the diffusion coefficient of Nb (cm 2 s −1 ), and t (s) also represents the homogenization time. Hence, D can be calculated by fitting the linear relationship between ln δ and t .…”

Section: Methodsmentioning

confidence: 99%

“…The solidification segregation, especially the precipitation of brittle Laves phase, is very harmful on Inconel 718 alloy hot work‐ability and material properties. The homogenization treatment is still a challenge in industry production . According to Jones et al, variations in Nb, Cr, and Fe percent composition of alloy 718 were found to affect segregation of phase precipitation, the least segregated alloy was low in Nb, Cr, and Fe concentrations .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Vanadium on the Solidification and Homogenization Behaviors in Inconel 718 Alloy

Wang

Jiang

et al. 2016

Adv Eng Mater

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Effect of vanadium (V) on the solidification and homogenization behaviors in Inconel 718 alloy is investigated. V is observed to evenly distribute in dendritic and interdendritic zones, and slightly increase niobium (Nb) and molybdenum (Mo) segregation coefficients. However, Laves phase volume fraction reduces from 2.3 to 0.4%, indicating that V may effectively prevent the precipitation of Laves phase. Homogenization results show that diffusion coefficient of Nb is much higher in the V-containing alloy, and it takes fewer hours to remove Laves phase, which suggest that microalloying of V can be very helpful in ingots homogenization annealing of Inconel 718 alloy in industry production.

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

“…Thus, for the as‐cast ingot, δ = 1, and the value will decrease with homogenization treatment performed. According to Miao et al, a more simplified equation for δ is given, viz.,

\ln δ = - \frac{4 {normalπ}^{2}}{{normalL}^{2}} D t

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Vanadium on the Solidification and Homogenization Behaviors in Inconel 718 Alloy

Wang

Jiang

et al. 2016

Adv Eng Mater

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“…우주 항공용 부품 소재의 경우, 복잡한 형상으로 인하 여 단조 합금을 적용하기 어려우며, 부품 간의 용접이나 기 계적인 결합이 용이하지 않기 때문에 주조 합금 개발 요구가 대두되고 있다. 그러나 부품이 대형화 될수록 주조 공정 과정에서 발생하 는 주조 결함과 편석은 합금의 심각한 기계적 특성 저하를 초래하게 된다 [7]. 최근까지 여러 가지 진보한 주조 기술이 개발되었지만, 주조 공정 과정에서 주조 결함과 편석은 피할 수 없는 현상으로 이를 주조 공정에서 완전하게 해소하기 불 가능하다.…”

Section: 서 론unclassified

Effect of Heat-treatment on Microstructure and Tensile Properties in Cast Alloy 718

Do¹,

Kim²,

Choi³

et al. 2016

Journal of Korea Foundry Society

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The effect of various types of heat-treatment on the mechanical properties of cast Alloy 718 has been investigated. Cast Alloy 718 bars were subjected to 'standard heat-treatment'_(SHT), 'HIP (Hot Isostatic Pressing) heat-treatment'_(HHT), and 'HIP-simulated heat-treatment'_(HS). In the absence of long time high temperature heat-treatment, a small amount of Laves phase remained in the 'SHT' specimen, and needle shaped δ precipitated in the vicinity of the Laves phase. Due to the formation of the Laves and δ phases in the 'SHT' specimen, it exhibited lower tensile properties than those of the others_specimens. On the other hand, the Laves phase was completely dissolved into the matrix after 'HHT' and 'HS' treatments. It is known that isostatic pressure reduces the self-diffusion coefficient, because of the lower self-diffusivity under HIP conditions in the interdendritic region, Nb segregation and the high amount of γ" precipitation that occurs. Due to the higher fraction of coarse γ" phases, the 'HHT' treated Alloy 718 showed excellent tensile strength.

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Multiscale Modeling of Heat Treatment Processing for Single‐Crystal Ni‐Base Superalloys

Chen

Suzuki

Konitzer³

2016

Superalloys 2016

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Quantitative analysis of homogenization treatment of INCONEL718 superalloy

Cited by 68 publications

References 7 publications

Effect of Vanadium on the Solidification and Homogenization Behaviors in Inconel 718 Alloy

Effect of Vanadium on the Solidification and Homogenization Behaviors in Inconel 718 Alloy

Effect of Heat-treatment on Microstructure and Tensile Properties in Cast Alloy 718

Multiscale Modeling of Heat Treatment Processing for Single‐Crystal Ni‐Base Superalloys

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