Aluminum-alloy material

Abstract

An aluminum-alloy material (1) has an Al matrix and second-phase particles dispersed in the Al matrix, wherein the value of a metallographic-structure factor F indicated in Equation (1) below is 0.005 or more.F=A·ρ·L·exp(B·E)  (1)Therein, in the above-mentioned Equation (1), L is the total [μm/μm2] of the perimeters of the second-phase particles, from among the second-phase particles present in an arbitrary cross section, whose circle-equivalent diameters are 0.2 μm or more, ρ is the dislocation density [μm−2], E is the electrical conductivity [% IACS] at 25° C., A and B are correction coefficients determined in accordance with the chemical composition of the aluminum-alloy material, 0.2×10−15≤A≤20×10−15, and 0.1≤B≤1.0.

1 . An aluminum-alloy material having an Al matrix and second-phase particles dispersed in the Al matrix, wherein:
 the value of a metallographic-structure factor F indicated in Equation (1) below is 0.005 or more:
     F=A·ρ·L ·exp( B·E )  (1)
 
   wherein, in the above-mentioned Equation (1),   L is the total [μm/μm 2 ] of the perimeters of the second-phase particles, from among the second-phase particles present in an arbitrary cross section, that have a circle-equivalent diameter of 0.2 μm or more,   ρ is the dislocation density [μm −2 ],   E is the electrical conductivity [% IACS] at 25° C.,   A and B are correction coefficients determined in accordance with the chemical composition of the aluminum-alloy material,   0.2×10 −15 ≤A≤20×10 −15 , and   0.1≤B≤1.0.   
     
     
         2 . The aluminum-alloy material according to  claim 1 , wherein the aluminum-alloy material has a chemical composition that contains Fe: 0.30-3.0 mass %, the remainder being Al and unavoidable impurities. 
     
     
         3 . The aluminum-alloy material according to  claim 1 , wherein the aluminum-alloy material further contains Mn: 0.10-1.50 mass %. 
     
     
         4 . The aluminum-alloy material according to  claim 1 , wherein the aluminum-alloy material contains one or two or more additional elements selected from the group consisting of:
 Si: 0.0050-3.0 mass %,   Cu: 0.0030-0.10 mass %,   Mg: 0.0050-3.0 mass %,   Zn: 0.10-0.50 mass %,   Ni: 0.050-0.30 mass %,   Cr: 0.050-0.30 mass %,   Ti: 0.050-0.30 mass %,   V: 0.050-0.30 mass %, and   Zr: 0.0010-0.30 mass %.   
     
     
         5 . The aluminum-alloy material according to  claim 1 , wherein the aluminum-alloy material includes a fibrous structure. 
     
     
         6 . The aluminum-alloy material according to  claim 5 , wherein equiaxial crystal grains are not present in the arbitrary cross-section and an average value of crystal grains in a cross-section parallel to a processing direction of the aluminum-alloy material have an aspect ratio of 10 or more. 
     
     
         7 . The aluminum-alloy material according to  claim 6 , wherein the aluminum-alloy material has a chemical composition that contains Fe: 0.30-3.0 mass %. 
     
     
         8 . The aluminum-alloy material according to  claim 7 , wherein the aluminum-alloy material further contains Mn: 0.10-1.50 mass %. 
     
     
         9 . The aluminum-alloy material according to  claim 7 , wherein the aluminum-alloy material contains one or two or more additional elements selected from the group consisting of:
 Si: 0.0050-3.0 mass %,   Cu: 0.0030-0.10 mass %,   Mg: 0.0050-3.0 mass %,   Zn: 0.10-0.50 mass %,   Ni: 0.050-0.30 mass %,   Cr: 0.050-0.30 mass %,   Ti: 0.050-0.30 mass %,   V: 0.050-0.30 mass %, and   Zr: 0.0010-0.30 mass %.   
     
     
         10 . The aluminum-alloy material according to  claim 8 , wherein the aluminum-alloy material has a chemical composition that contains Fe: 0.50-2.0 mass %. 
     
     
         11 . The aluminum-alloy material according to  claim 7 , wherein the metallographic-structure factor F is 0.05 or more. 
     
     
         12 . The aluminum-alloy material according to  claim 11 , wherein the dislocation density ρ is 50 μm −2  or more. 
     
     
         13 . The aluminum-alloy material according to  claim 12 , wherein the total [μm/μm 2 ] of the perimeters of the second-phase particles is 0.1 μm/μm 2  or more. 
     
     
         14 . The aluminum-alloy material according to  claim 13 , wherein the electrical conductivity at 25° C. is 50% IACS or more. 
     
     
         15 . The aluminum-alloy material according to  claim 14 , wherein the aluminum-alloy foil is prepared by a process comprising:
 casting an ingot;   performing a homogenizing treatment by holding the ingot at a temperature of 200-550° C.;   preparing a hot-rolled sheet by performing hot-rolling on the ingot with a rolling start temperature of 200° C.-550° C.; and   preparing a cold-rolled sheet by performing cold-rolling on the hot-rolled sheet such that the total rolling reduction is 50% or more.   
     
     
         16 . The aluminum-alloy material according to  claim 15 , wherein the process further comprises:
 performing a final annealing by holding the cold-rolled sheet at a temperature of 100-200° C.   
     
     
         17 . The aluminum-alloy material according to  claim 15 , wherein the aluminum-alloy material has a chemical composition that contains Fe: 1.0-2.0 mass %. 
     
     
         18 . The aluminum-alloy material according to  claim 1 , wherein the aluminum-alloy material has a chemical composition that contains Fe: 1.0-2.0 mass %. 
     
     
         19 . The aluminum-alloy material according to  claim 1 , wherein the metallographic-structure factor F is 0.05 or more. 
     
     
         20 . A method of manufacturing the aluminum-alloy foil according to  claim 1 , comprising:
 casting an ingot;   performing a homogenizing treatment by holding the ingot at a temperature of 200-550° C.;   preparing a hot-rolled sheet by performing hot-rolling on the ingot with a rolling start temperature of 200° C.-550° C.; and   preparing a cold-rolled sheet by performing cold-rolling on the hot-rolled sheet such that the total rolling reduction is 50% or more.