-
Article
Strengthening Effect of Decreased Dislocation Density After Annealing in Pure Aluminum or Copper
Plastic deformation in metals occurs through the generation and movement of dislocations, leading to strain hardening. The dislocation density has long been known as a measure of work hardening in metals and a...
-
Article
Mechanical Strength and Electrical Conductivity of Cu–In Solid Solution Alloy Wires
Conductive spring wires for application in electrical components require high strength, high electrical conductivity, and convenient manufacturability. Copper–indium (Cu–In) solid solution alloys are suitable ...
-
Article
Discontinuous precipitation at the deformation band in copper alloy
The Cu-Ni-Si alloy is known as a precipitation hardening alloy, where the Ni2Si intermetallic compound is precipitated in the matrix during aging. There are two types of precipitation of Ni2Si: continuous and dis...
-
Article
Open AccessSimultaneous increase in strength and ductility by decreasing interface energy between Zn and Al phases in cast Al-Zn-Cu alloy
Cast-Al alloys that include a high amount of the second element in their matrix have comparatively high strength but low ductility because of the high volume fraction of strengthening phases or undesirable inc...
-
Article
Optimization of conductivity and strength in Cu-Ni-Si alloys by suppressing discontinuous precipitation
Cu-Ni-Si alloys with and without Ti were solution treated at 980 °C for 1 h and cooled by air cooling and water quenching, after which the specimens were aged at 500 °C. The two alloys showed different aging c...
-
Article
Open AccessIncreasing strength and conductivity of Cu alloy through abnormal plastic deformation of an intermetallic compound
The precipitation strengthening of Cu alloys inevitably accompanies lowering of their electric conductivity and ductility. We produced bulk Cu alloys arrayed with nanofibers of stiff intermetallic compound thr...
-
Article
Open AccessDesign of exceptionally strong and conductive Cu alloys beyond the conventional speculation via the interfacial energy-controlled dispersion of γ-Al2O3 nanoparticles
The development of Cu-based alloys with high-mechanical properties (strength, ductility) and electrical conductivity plays a key role over a wide range of industrial applications. Successful design of the mate...
-
Article
Open AccessReliable and cost effective design of intermetallic Ni2Si nanowires and direct characterization of its mechanical properties
We report that a single crystal Ni2Si nanowire (NW) of intermetallic compound can be reliably designed using simple three-step processes: casting a ternary Cu-Ni-Si alloy, nucleate and growth of Ni2Si NWs as embe...
-
Article
Tensile and electrical properties of direct aged Cu-Ni-Si-x%Ti alloys
In this study, the tensile and electrical properties of aged Cu-4Ni-Si-Ti (C4NS-Ti) alloys, with and without solution heat treatment (SHT) prior to aging, were examined. The C4NS specimens, without and with 0....
-
Article
Effects of Ti addition and heat treatments on mechanical and electrical properties of Cu-Ni-Si alloys
The mechanical and electrical properties of Cu-5.98Ni-1.43Si and Cu-5.98Ni-1.29Si-0.24Ti alloys under heat treatment at 400 and 500 °C after hot- and cold-rolling were investigated, and a microstructural analy...
-
Article
Microstructural study on effects of C-alloying on Cu-Fe-P cast alloy
The effects of C-alloying on the microstructure and secondary phase particles of Cu-2.5Fe-0.1P cast alloy were investigated by transmission electron microscopy (TEM), high-resolution electron microscopy (HREM)...
-
Article
Statistical description of the effect of Zr addition on the behavior of microcracks in Cu–6Ni–2Mn–2Sn–2Al Alloy
As possible substitutes for high-strength Cu–Be alloys, Cu–6Ni–2Mn–2Sn–2Al alloys have been developed. To clarify the physical background of the effect of trace Zr on the fatigue strength of such alloys, the i...
-
Article
Formation of nano-sized grains in Cu and Cu−Fe−P alloys by accumulative roll bonding process
Mechanical properties and formation of nano-sized grains in Cu and Cu−Fe−P alloys by the accumulative roll bonding (ARB) process were investigated. Nano-sized grains were successfully obtained in OFC and PMC-9...
-
Article
Tensile strength of thermomechanically processed Cu-9Ni-6Sn alloys
The tensile properties of Cu-9Ni-6Sn alloys with different swaging amounts of 64, 77, and 95 pct, either solutionized and aged (S/A) or directly aged (D/A), were examined as a function of aging time. It was fo...
-
Article
Alloy design and coarsening phenomenon of L12 precipitates in high-temperature Al-2 At. Pct (Ti,V,Zr) systems
Aging works of two melt-spun Al-2 at pct (Ti,V,Zr) alloys showed that metastable L12 Al3(Ti,V,Zr) precipitates were dominant and did not transform to stable D023 ones: the average radius was 3 to 4 nm and the int...
