Thin Strip vs Direct Chill Casting: The Effects of Casting Cooling Rate on the As-cast Microstructure of AA6005 Al–Si–Mg Alloy

Metallurgical and Materials Transactions A - Aluminum AA6005 sheet produced by Thin Strip (TS) casting was compared to the slabs produced by Direct Chill casting in the as-cast state. Higher...     

Stress–Strain Predictions of Semisolid Al-Mg-Mn Alloys During Direct Chill Casting: Effects of Microstructure and Process Variables

The occurrence of hot tearing during the industrial direct chill (DC) casting process results in significant quality issues and a reduction in productivity. In order to investigate their occurrence, a new semisolid constitutive law (Phillion et al.) for AA5182 that takes into account cooling rate, grain size, and porosity has been incorporated within a DC casting finite element process model for round billets. A hot tearing index was calculated from the semisolid strain predictions from the model. This hot tearing index, along with semisolid stress–strain predictions from the model, was used to perform a sensitivity analysis on the relative effects of microstructural features (e.g., grain size, coalescence temperature) as well as process parameters (e.g., casting speed) on hot tearing. It was found that grain refinement plays an important role in the formation of hot cracks. In addition, the combination of slow casting speeds and a low temperature for mechanical coalescence was found to improve hot tearing resistance.     

Step-by-Step Observation of Secondary-Phase Evolution During the Casting Cracking Process in Mg–Ce–Al Alloys

Metallurgical and Materials Transactions A - Secondary phases are key factors affecting cracking behavior during casting, but it is still unclear how exactly cracks form. The cracking...     

Assimilation of Production Under Casting and Rolling Conditions of Pipe Rolled Product from Steels of the V–N Microalloying System Resistant to Cold and Hydrogen Sulfide Cracking

Metallurgist - Results are provided for assimilation under casting and rolling complex conditions of pipe rolled product of the V–N microalloying system that is characterized not only by high...     

Understanding the Initial Solidification Behavior for Al–Si Alloy in Cold Chamber High-Pressure Die Casting (CC-HPDC) Process Combining Experimental and Modeling Approach

Metallurgical and Materials Transactions A - In the cold chamber high-pressure die casting (CC-HPDC) process, alloy solidification in the shot sleeve due to heat loss leads to the formation of...