Compressive Rheological Behavior and Microstructure Evolution of a Semi-Solid CuSn10P1 Alloy at Medium Temperature and Low Strain

Abstract

Copper–tin alloys are widely used in the machining and molding of sleeves, bearings, bearing housings, gears, etc. They are a material used in heavy-duty, high-speed and high-temperature situations and subject to strong friction conditions due to their high strength, high modulus of elasticity, low coefficient of friction and good wear and corrosion resistance. Although copper–tin alloys are excellent materials, a higher performance of mechanical parts is required under extreme operating conditions. Plastic deformation is an effective way to improve the overall performance of a workpiece. In this study, medium-temperature compression tests were performed on a semi-solid CuSn10P1 alloy using a Gleeble 1500D testing machine at different temperatures (350−440 °C) and strain rates (0.1−10 s−1) to obtain its medium-temperature deformation characteristics. The experimental results show that the filamentary deformation marks appearing during the deformation are not single twins or slip lines, but a mixture of dislocations, stacking faults and twins. Within the experimental parameters, the filamentary deformation marks increase with increasing strain and decrease with increasing temperature. Twinning subdivides the grains into lamellar sheets, and dislocation aggregates are found near the twinning boundaries. The results of this study are expected to make a theoretical contribution to the forming of copper–tin alloys in post-processing processes such as rolling and forging.

Effect of Alloying Additives and Moulding Technology on Microstructure, Tightness, and Mechanical Properties of CuSn10 Bronze

“…The technological, strength, and plastic properties of the discussed bronzes are dependent on the amount of tin they contain [2,10,[25][26][27]. In the green-sand-casting process of bronzes, it can be observed that, as the tin content increases, the values of the strength properties and hardness increase (with a simultaneous decrease in elongation).…”

Microstructural Investigation of Some Bronze Artifacts Discovered in a Dacian Site Using Non-Destructive Methods

“…Actual bronze alloys are based on the Cu-Sn binary system and are very well standardized and designed for precise technological and industrial purposes [1][2][3][4]. The ancient bronze elaboration is not as precise as actual bronzes because of a lack of chemical composition control during smelting but still respects the basics of the Cu-Sn binary system, a These fortresses were the residence of powerful noble men (under command of the Dacian King) who ruled over wide settlements disposed around the forts.…”