Results 301 to 310 of about 1,126,742 (354)
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Observation of crack initiation during hot tearing
International Journal of Cast Metals Research, 2006AbstractWhile the general mechanisms of hot tearing are understood, i.e. the inability of liquid to feed imposed strain on the mushy material, work continues on improving the understanding of the mechanisms at play. A hot tear test rig that measures the temperature and load imposed on the mushy zone during solidification has been successfully used to ...
Davidson, C. +3 more
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Hot-tearing susceptibility of Al–Zn alloys
Russian Metallurgy (Metally), 2017The modern concepts of the causes of hot tearing are considered and the influence of the solid fraction growth rate of an alloy is studied. The hot-tearing susceptibility (HTS) of binary Al–(5–73) wt % Zn alloys is investigated using backbone tests. The HTS is found to be maximal at ~25 wt % Zn.
V. E. Bazhenov +3 more
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Hot tearing evaluation for aluminium alloys
AIP Conference Proceedings, 2016Hot tearing during solidification of aluminium alloys castings can be a serious problem. This phenomenon is well known but still insufficiently investigated. Hot tearing occurs in form of irregular cracks in metal castings that develop during solidification and cooling.
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International Journal of Cast Metals Research, 2014
In this work, a new criterion for estimating hot tear susceptibility called overall hot tearing susceptibility (OHTS) is proposed to determine hot tearing tendency in the mould region during continuous casting. The OHTS criterion takes into account the cooling rate, brittle temperature range, strain rate and thickness of the brittle region.
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In this work, a new criterion for estimating hot tear susceptibility called overall hot tearing susceptibility (OHTS) is proposed to determine hot tearing tendency in the mould region during continuous casting. The OHTS criterion takes into account the cooling rate, brittle temperature range, strain rate and thickness of the brittle region.
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Modeling of hot tearing formation during solidification
Journal of Materials Processing Technology, 2008Abstract A new criterion for the appearance of hot tears in metallic alloys is proposed. This model introduces a critical solid fraction (fcr) to simulate feeding. A hot-cracking sensitivity (HCS) index according to the temperature and solidification time is defined and then is compared with other hot tearing criteria.
N. Hatami +3 more
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JOM, 1956
shows that the hot tearing tendency exists in a narrow temperature range and is primarily effected by the heterogeneous freezing point of the metal.
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shows that the hot tearing tendency exists in a narrow temperature range and is primarily effected by the heterogeneous freezing point of the metal.
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Hot tears in grey iron castings
2015In general, one of the main casting defects due to residual stresses are cracks (tears). Cracks may be defined as a material separation, which is caused by mechanical and dynamic overloads. There are cold and hot cracks, depending on the temperature range in which they occurred.
Novoselović, Daniel +2 more
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Hot Tearing in Magnesium-Rare Earth Alloys
2016Magnesium-rare earth based alloys generally show good creep resistance at elevated temperatures and are consequently very promising candidates for powertrain applications. However, for magnesium-rare earth alloys to be used in high pressure die-cast components, they also need to have sufficient die-castability.
Mark Easton +5 more
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Hot Tearing Susceptibility of Mg-Ca Binary Alloys
Metallurgical and Materials Transactions A, 2015Hot tearing is known as one of the most critical solidification defects commonly encountered during casting practice. As most Mg alloys are initially prepared by casting, ingots must have superior quality with no casting defects for the further processing.
Jiangfeng Song +6 more
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2008
The influence of process parameters on the occurrence of hot tearing during laser butt welding of 6xxx aluminium alloys with the presence of a filler wire is investigated. Lowering the welding speed and the solidification rate leads to welds with fewer defects. The chemical composition of the weld pool is shown to have a strong influence on hot tearing
Fabregue, D. +3 more
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The influence of process parameters on the occurrence of hot tearing during laser butt welding of 6xxx aluminium alloys with the presence of a filler wire is investigated. Lowering the welding speed and the solidification rate leads to welds with fewer defects. The chemical composition of the weld pool is shown to have a strong influence on hot tearing
Fabregue, D. +3 more
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