Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2013 - zeszyt 4

Combination of equal channel angular pressing and hydrostatic extrusion as a method for effective grain refinement of Cu and a Cu-alloy

nr katalogowy: 79722

Two strengthening mechanisms are the most frequently used to improve mechanical properties of copper. First relies on the addition of alloying elements and heat treatment leading to precipitation strengthening. This method, however, brings about a considerable drop of electric conductivity and ductility. The second one is related to Hall-Petch relationship [1÷3] which predicts a significant strengthening with the reduction in grain size, i.e. grain boundary strengthening. In metallic materials, the grain size refinement can be obtained by subjecting them to severe plastic deformation (SPD) [4÷7]. The equal channel angular pressing (ECAP) is one of the most frequently used processes to obtain ultra-fine grained materials [4, 5, 8]. However, it was demonstrated that at a certain level of strain, further grain size reduction cannot be achieved due to a kind of equilibrium between the rate of defect generation and annihilation [9, 10]. In order to make further grain refinement possible, another deformation process needs to be involved which can be realized by the combination of two or more SPD processes. In the literature, ECAP was combined with conventional rolling [10, 11], high pressure torsion [12] or by hydrostatic extrusion (HE) [13]. In the case of pure copper, the ability to grain refinement is relatively low [14, 15], i.e. grain size not smaller than 200 nm can be achieved. In order to increase the grain refinement level and at the same keep high electric conductivity and ductility, copper can be alloyed with a small amounts of alloying elements [16, 17]. In the present study, two materials: pure copper and commercially used copper alloy (CuCrZr) were subjected to the combination of ECAP and HE to assess the viability of such a combination as a method of grain size refinement and production of high strength copper in the form of 5 mm diameter long rods. EXPERIMENT High purity (99.99%) copper and CuCrZr alloy with chemic[...]

Jeśli masz wykupiony/przyznany dostęp - zaloguj się. Skorzystaj z naszych propozycji zakupu!

Publikacja


e-Publikacja (format pdf) - nr 79722 "Combination of equal chan..." licencja: Osobista Produkt cyfrowy	10.00 zł

Zeszyt


INŻYNIERIA MATERIAŁOWA - e-zeszyt (pdf) 2013-4 licencja: Osobista Produkt cyfrowy	65.00 zł

Prenumerata

INŻYNIERIA MATERIAŁOWA - prenumerata cyfrowa
licencja: Osobista

Produkt cyfrowy
Nowość

402.00 zł

INŻYNIERIA MATERIAŁOWA - papierowa prenumerata roczna + wysyłka
licencja: Osobista

Szczegóły pakietu

Nazwa
INŻYNIERIA MATERIAŁOWA - papierowa prenumerata roczna	492.00 zł brutto 455.56 zł netto 36.44 zł VAT (stawka VAT 8%)
INŻYNIERIA MATERIAŁOWA - pakowanie i wysyłka	21.00 zł brutto 17.07 zł netto 3.93 zł VAT (stawka VAT 23%)

513.00 zł

INŻYNIERIA MATERIAŁOWA - PAKIET prenumerata PLUS
licencja: Osobista

Szczegóły pakietu

Nazwa
INŻYNIERIA MATERIAŁOWA - PAKIET prenumerata PLUS (Prenumerata papierowa + dostęp do portalu sigma-not.pl + e-prenumerata)	600.00 zł brutto 555.56 zł netto 44.44 zł VAT (stawka VAT 8%)

600.00 zł

Zeszyt

2013-4

Twój Koszyk

Publikacja

Zeszyt

Prenumerata

Zeszyt

Czasopisma