The disclosure provides a modified tin-phosphor bronze alloy and a preparation method thereof. The modified tin-phosphor bronze alloy comprises the following elements in percentage by mass: 4.0-10 wt % of Sn, 0.01-0.3 wt % of P and the balance of Cu and inevitable impurity elements, the average grain size of the modified tin-phosphor bronze alloy is 1-3 m, the grain size is in normal distribution, and the standard deviation of the grain size is below 0.8 m; the proportion of the total low-CSL grain boundary in the modified tin-phosphor bronze alloy in the whole grain boundary is 66-74%, and in the total low-CSL grain boundary, the ratio range of (9+27)/3 is (0.12-0.23):1. The modified tin-phosphor bronze alloy of this disclosure enables a finished alloy can give consideration to both tensile strength and excellent bending performance.

The disclosure provides a fine-grain tin-phosphor bronze alloy strip and a preparation method thereof. The fine-grain tin-phosphor bronze alloy strip comprises the following elements in percentage by mass: 4.0-10 wt % of Sn, 0.01-0.3 wt % of P and the balance of Cu and inevitable impurity elements, the average grain size of the tin-phosphor bronze alloy strip is 1-3 m, the grain size is in normal distribution, and the standard deviation of the grain size is 0.9 m or below; the proportion of the total low-CSL grain boundary in the tin-phosphor bronze alloy strip in the whole grain boundary is 66-74%, and in the total low-CSL grain boundary, the ratio range of (9+27)/3 is 0.12-0.23:1. The fine-grain tin-phosphor bronze alloy strip of this disclosure enables a finished strip can have the tensile strength and the excellent bending performance at the same time.

A copper-aluminum composite plate material prepared by aluminum liquid continuous casting and a process thereof. The method includes: S1, heating an aluminum ingot to 700-800 C. and smelting for 1-3 h; S2, degassing smelted aluminum liquid, and keeping the temperature and standing; S3, texturing a copper strip, and then cleaning; S4, heating the pretreated copper strip to 200-650 C.; S5, under the protection of inert gas, continuously casting the treated aluminum liquid on the treated copper strip, performing quenching crystallization on a copper-aluminum composite material, and performing oxygen-free continuous casting; and S6, continuous rolling: rolling the continuously cast copper-aluminum composite material to obtain the copper-aluminum composite plate material prepared by aluminum liquid continuous casting.

A copper-aluminum composite plate material prepared by aluminum liquid continuous casting and a process thereof. The method includes: S1, heating an aluminum ingot to 700-800 C. and smelting for 1-3 h; S2, degassing smelted aluminum liquid, and keeping the temperature and standing; S3, texturing a copper strip, and then cleaning; S4, heating the pretreated copper strip to 200-650 C.; S5, under the protection of inert gas, continuously casting the treated aluminum liquid on the treated copper strip, performing quenching crystallization on a copper-aluminum composite material, and performing oxygen-free continuous casting; and S6, continuous rolling: rolling the continuously cast copper-aluminum composite material to obtain the copper-aluminum composite plate material prepared by aluminum liquid continuous casting.

A ribbon of elastocaloric material is provided. The ribbon is made from copper alloyed with aluminum and manganese. The ribbon has a length, a width, and a thickness. The length is a longest dimension of the ribbon, and the width is perpendicular to the length. The thickness is perpendicular to both the length and the width, and the thickness is 0.1 mm or less. Further, in a room temperature ambient environment, the ribbon increases in temperature by at least 4 C. upon application of 6% of tensile strain and cools by at least 4 C. when the tensile strain is unloaded.

Wrought copper-zinc alloy for producing a semi-finished product with composition in wt. %: Cu: 58.0 to 66.0%, Si: 0.15 to 1,2%, P: 0.20 to 0.38%, Sn: up to 0.5%, Al: up to 0.05%, Fe: up to 0.3%, Ni: up to 0.3%, Pb: up to 0.25%, Bi: up to 0.1%, Te, Se, In: 0.1%, B: up to 0.01%, the rest Zn and impurities. The alloy has globular a-phase, B-phase and phosphide particles. The proportion of B-phase in the sum of -phase and -phase is 20 vol. % and max. 60 vol. %. In an area of 21000 m.sup.2 are 50 to 700 phosphide particles with an equivalent diameter of 0.5 to 1 m, 10 to 300 phosphide particles with an equivalent diameter of 1 to 2 m, and 3 to 45 phosphide particles with an equivalent diameter of 2 to 5 m.