Assessment of hot tears in cast steel components

Maile, Karl; Theofel, Heinrich; Weichert, Cindy; Mayer, Karl-Heinz; Gerdes, C.; Sheng, Shilun

doi:10.1016/s0308-0161(01)00101-6

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Generally, besides each open hot tear, partly and completely healed hot tears can also be found. They result from penetration residual melt, which fills up the separation totally (healed hot tears) or partly (partly healed hot tears) [9].…”

Section: Resultsmentioning

confidence: 99%

Effects of Cooling Condition on Hot Tearing during Investment Casting

Norouzi

Farhangi

2011

AMR

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In the present study, the effect of cooling condition on hot tearing tendency and hot tearing fracture surface morphology were investigated. Results show that, the hot tear fracture surface characteristics are nearly similar under different cooling conditions. The hot tear surface exhibits two main features; the brittle region and the ductile region. The results also indicate that cooling condition has multifaceted effects on hot tearing phenomenon. Increasing cooling rate increases the thermal gradient, which raises the hot tearing tendency; concomitantly it decreases the grain size and dendrite arm spacing which increases the strength of the material. The occurrence of hot tearing phenomenon under different cooling conditions is discussed and evaluated based on the competition between these opposing factors during the solidification process.

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Section: Resultsmentioning

confidence: 99%

Effects of Cooling Condition on Hot Tearing during Investment Casting

Norouzi

Farhangi

2011

AMR

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“…In addition, casting parameters such as mold preheat temperature, pouring temperature and cooling rate are also important parameters directly or indirectly affecting the hot tearing susceptibility of an alloy. Comprehensive reviews by Maile et al [8] and Eskin et al [9] have summarized the hot tearing behavior in steels and aluminum alloys separately. However, limited works have been carried out on hot tearing of magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cooling Rate on Hot Tearing Behavior of Mg-9Al-1Zn-0.8Ce Alloy

Liu

Jiang

et al. 2017

MSF

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The influence of cooling rate (1.5, 0.3 and 0.1 °C/s) on the hot tearing susceptibility (HTS) of Mg-9Al-1Zn-0.8Ce alloy was investigated by taking advantage of numerical simulation and experimental methods. Filling and solidification processes were observed directly using AnyCasting software. The results demonstrated that the reduction of cooling rate increases the residual melt modulus, deteriorate strain and stress concentration at last stage of solidification, and decrease the hot tearing resistance of alloy finally. The maximum value of HTS was obtained at the average cooling rate of 0.1 °C/s owing to the coarse microstructures and bulk Al11Ce3. The minimum value of HTS appeared at the rate of 1.5 °C/s thanks to the finest microstructures and a large amount of eutectic. With the increase of cooling rate, hot tearing susceptibility of the alloy shows a rapid reduction at beginning, and a slow decline followed. Besides, morphology of fracture surface and distribution of secondary phase were further discussed.

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