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This paper presents the possibilities of forming the microstructure as well as mechanical properties and electrical conductivity of Cu-3Ti alloy (wt.%) in thermal and thermomechanical processes that are a combination of homogenising treatment, hot and cold working, solution treatment and ageing. Phase composition of the alloy following various stages of processing it into the specified semi-finished product was being determined too. It was demonstrated that the application of cold plastic deformation between solution treatment and ageing could significantly enhance the effect of hardening of the Cu-3Ti alloy without deteriorating its electrical conductivity. It was found that for the investigated alloy the selection of appropriate conditions for homogenising treatment, hot and cold deformation as well as solution treatment and ageing enables to obtain the properties comparable to those of beryllium bronzes.

Section: Resultsmentioning

confidence: 99%

“…The use of thermomechanical treatment and ageing enables to obtain higher strength properties. The cold deformation between solution treatment and ageing allows to have much higher hardening after a shorter ageing time compared to alloys subjected to solution treatment and ageing only [15,16].…”

Section: Introductionmentioning

confidence: 99%

Formation of microstructure and properties of Cu-3Ti alloy in thermal and thermomechanical processes

Szkliniarz

2017

“…solution heat treatment and aging, intended to ensure a required hardening level [3,7,11,12,21]. Sometimes, to obtain a higher hardening effect, the cold working process is performed between the solution heat treatment and aging processes [10,22,23].…”

Section: Introductionmentioning

confidence: 99%

“…The performance characteristics of titanium bronzes result from the titanium content, the size of matrix (coppertitanium solid solution) grain, overall deformation during cold working and morphologies of generated (during solution heat treatment and aging) dispersed precipitates of intermetallic phases [1][2][3][4][5][6][7][8][9][10][11][14][15][16][17][18][19][20][21][22][23]. The matrix grain size, created during the hot working processes, markedly determines properties of titanium bronze semi-finished and finished products, affecting the course and effect of cold working as well as subsequent solution heat treatment and aging [2,7,23,24].…”

Section: Introductionmentioning

confidence: 99%

Microstructure of Hot-Deformed Cu-3Ti Alloy

Szkliniarz¹,

Szkliniarz²,

Blacha³

et al. 2016

In the paper, results of investigations regarding temperature and strain rate effects on hot-deformed Cu-3Ti alloy microstructure are presented. Evaluation of the alloy microstructure was performed with the use of a Gleeble HDS-V40 thermal-mechanical simulator on samples subjected to uniaxial hot compression within 700 to 900ºC and at the strain rate of 0.1, 1.0 or 10.0 s -1 until 70% (1.2) strain. It was found that within the analyzed temperature and strain rate ranges, the alloy deformation led to partial or complete recrystallization of its structure and to multiple refinement of the initial grains. The recrystallization level and the average diameter of recrystallized grains increase with growing temperature and strain rate. It was shown that entirely recrystallized, fine-grained alloy structure could be obtained following deformation at the strain rate of min 10.0 s -1 and the temperature of 800°C or higher.

“…This process is usually realised at temperatures of 400-700°C for 1 to 48 hours. It has been found that strengthening of the alloys occurs if the plastic working employed includes cold rolling before ageing [6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Service Properties of Copper Alloys

Polok-Rubiniec

Konieczny

Labisz

et al. 2016

This elaboration shows the effect of combined heat treatment and cold working on the structure and utility properties of alloyed copper. As the test material, alloyed copper CuTi4 was employed. The samples were subjected to treatment according to the following schema: 1 st variant -supersaturation and ageing, 2 nd variant -supersaturation, cold rolling and ageing. The paper presents the results of microstructure, hardness, and abrasion resistance. The analysis of the wipe profile geometry was realized using a Zeiss LSM 5 exciter confocal microscope. Cold working of the supersaturated solid solution affects significantly its hardness but the cold plastic deformation causes deterioration of the wear resistance of the finally aged CuTi4 alloy.