Aluminum alloy material

Abstract

An aluminum alloy material including 1.2 atom % or more and 6.5 atom % or less of Fe, and 0.005 atom % or more and less than 0.15 atom % of one or more elements selected from the group consisting of Nd, W, and Sc, with the balance being Al and unavoidable impurities.

1 . An aluminum alloy material comprising:
 1.2 atom % or more and 6.5 atom % or less of Fe; and   0.005 atom % or more and less than 0.15 atom % of one or more elements selected from the group consisting of Nd, W, and Sc,   with the balance being Al and unavoidable impurities.   
     
     
         2 . The aluminum alloy material according to  claim 1 , wherein
 the aluminum alloy material comprises a structure including a matrix that includes 99 atom % or more of Al and a particle that is present in the matrix and that is composed of a compound including Al and Fe, and   in an arbitrary cross section of the aluminum alloy material, an average grain size of crystal grains forming the matrix is 1700 nm or less and an average length of the particle composed of the compound is 140 nm or less.   
     
     
         3 . The aluminum alloy material according to  claim 2 , wherein, in the cross section, when the area of a square region having a side length of 500 nm is taken as a unit area, an average number of the particles composed of the compound present per unit area is 10 or more and 220 or less. 
     
     
         4 . The aluminum alloy material according to  claim 2 , wherein the particle composed of the compound has an aspect ratio of 3.5 or less. 
     
     
         5 . The aluminum alloy material according to  claim 1 , wherein
 a Vickers hardness at 25° C. is 85 Hv or more, and   a temperature coefficient relating to a decrease in the Vickers hardness from 25° C. to 250° C. is 0.30%/° C. or less.   
     
     
         6 . The aluminum alloy material according to  claim 1 , wherein an elongation at break at 25° C. is 3% or more. 
     
     
         7 . An aluminum alloy material comprising:
 1.2 atom % or more and 6.5 atom % or less of Fe;   0.005 atom % or more and less than 0.15 atom % of one or more first elements selected from the group consisting of Nd, W, and Sc; and   0.005 atom % or more and less than 2 atom % of one or more second elements selected from the group consisting of C and B,   with the balance being Al and unavoidable impurities.   
     
     
         8 . The aluminum alloy material according to  claim 7 , wherein
 the aluminum alloy material comprises a structure including a matrix that includes 99 atom % or more of Al and a particle that is present in the matrix and that is composed of a compound including Al and Fe, and   in an arbitrary cross section of the aluminum alloy material, an average grain size of crystal grains forming the matrix is 1500 nm or less and an average length of the particle composed of the compound is 60 nm or less.   
     
     
         9 . The aluminum alloy material according to  claim 8 , wherein, in the cross section, when the area of a square region having a side length of 500 nm is taken as a unit area, an average number of the particles composed of the compound present per unit area is 40 or more and 530 or less. 
     
     
         10 . The aluminum alloy material according to  claim 8 , wherein the particle composed of the compound has an aspect ratio of 2.0 or less. 
     
     
         11 . The aluminum alloy material according to  claim 1 , wherein
 a Vickers hardness at 25° C. is 93 Hv or more, and   a temperature coefficient relating to a decrease in the Vickers hardness from 25° C. to 250° C. is 0.25%/° C. or less.   
     
     
         12 . The aluminum alloy material according to  claim 1 , wherein an elongation at break at 25° C. is 5% or more. 
     
     
         13 . The aluminum alloy material according to  claim 1 , wherein a rate of decrease in tensile strength from 25° C. to 250° C. is less than 0.28%/° C. 
     
     
         14 . The aluminum alloy material according to  claim 1 , wherein a tensile strength at 25° C. is 250 MPa or more. 
     
     
         15 . The aluminum alloy material according to  claim 1 , wherein the aluminum alloy material has a relative density of 90% or more. 
     
     
         16 . The aluminum alloy material according to  claim 7 , wherein
 a Vickers hardness at 25° C. is 93 Hv or more, and   a temperature coefficient relating to a decrease in the Vickers hardness from 25° C. to 250° C. is 0.25%/° C. or less.   
     
     
         17 . The aluminum alloy material according to  claim 7 , wherein an elongation at break at 25° C. is 5% or more. 
     
     
         18 . The aluminum alloy material according to  claim 7 , wherein a rate of decrease in tensile strength from 25° C. to 250° C. is less than 0.28%/° C. 
     
     
         19 . The aluminum alloy material according to  claim 7 , wherein a tensile strength at 25° C. is 250 MPa or more. 
     
     
         20 . The aluminum alloy material according to  claim 7 , wherein the aluminum alloy material has a relative density of 90% or more.