Measurement of filament spacing in deformation processed CuNb alloys

Microstructure-strength relationship of a deformation processed aluminum-titanium composite

“…Figure 55 and Table 6 shows the relation between the mean true distance and the thickness of the filaments. Previous investigations [3] have showed that phase spacing measurements from TEM images give a smaller number than from SEM images of the same material. This is probably the reason for the change in slope between q=7.7 and q=10.3 in Figure 55 [3].…”

“…This shows a less strengthening than both Cu-Nb and Ti-Y. These relationships are quite sensitive to the resolution of the microscopy used to photograph the microstructure for stereology and the equipment used to obtain these micrographs (TEM vs. SEM), and comparisons between different investigations are therefore difficult to make with confidence [3]. A relationship between filament spacing and UTS measured from only SEM or only TEM micrographs would be more accurate for comparison.…”

“…These relationships are quite sensitive to the resolution of the equipment used to obtain these micrographs (TEM vs. SEM), and comparisons between different investigations are therefore difficult to make with confidence [3]. ' Although the ultimate tensile strength of 596 MPa at q=12.1 for the AlGms-20Ti is relatively high, some of the precipitation-hardened commercial Al alloys have ultimate tensile strengths of nearly 700 MPa.…”

Alignment of Fe-rich Primary Phase in Cu–Fe Alloy Solidified under a High Magnetic Field

“…Thus, it is a promising strengthening method. For example, Cu-Ta, 4) Cu-Nb 4,5) alloys fabricated as in situ composite (also called deformation-processed composite) have excellent properties of over 1 400 MPa strength and 90% IACS electrical conductivity. In addition, directional solidification [12][13][14] has been developed as a new method of in situ composite fabricating in recent years in which fibrous reinforcement is aligned in matrix.…”

“…In order to solve this contradiction, many researchers have done a number of studies on strengthening of Cu-based alloy. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] Composite strengthening [1][2][3][4][5][6][7] can often produce the Cu-based alloys with higher strength than the one which strengthened by alloying methods [8][9][10][11] such as precipitation strengthening, aging strengthening, cold work hardening and so on. Composite strengthening can be classified into artificial composite in which preformed parts are used as reinforcement and in-situ composite in which reinforcement is generated automatically during fabrication.…”