The Effect of Different Thermal Treatment on the Allotropic fcc <-> hcp Transformation and Compression Behavior of Polycrystalline Cobalt

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00538508" target="_blank" >RIV/61389005:_____/20:00538508 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/20:10421562

Result on the web

<a href="https://doi.org/10.3390/ma13245775" target="_blank" >https://doi.org/10.3390/ma13245775</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma13245775" target="_blank" >10.3390/ma13245775</a>

Result language

angličtina

Original language name

The Effect of Different Thermal Treatment on the Allotropic fcc <-> hcp Transformation and Compression Behavior of Polycrystalline Cobalt

Original language description

Pure polycrystalline cobalt is systematically thermally treated in order to assess the effect of the microstructure on the compression behavior. Isothermal annealing of the as-drawn material leads to recrystallization and grain growth dependent on the annealing temperature (600-1100 degrees C). Consequently, the yield strength decreases and the fracture strain increases as a function of rising grain size. The content of the residual fcc phase is similar to 6-11%. Subsequent thermal cycling around the transition temperature is applied to further modify the microstructure, especially in terms of the fcc phase content. With the increasing number of cycles, the grain size further increases and the fraction of the fcc phase significantly drops. At the same time, the values of both the yield strength and fracture strain somewhat decrease. An atypical decrease in the fracture strain as a function of grain size is explained in terms of decreasing fcc phase content. The stress-induced fcc -> hcp transformation can accommodate a significant amount of plastic strain. Besides controlling basic material parameters (e.g., grain size and texture), adjusting the content of the fcc phase can thus provide an effective means of mechanical performance optimization with respect to particular applications.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

—

Volume of the periodical

13

Issue of the periodical within the volume

24

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

5775

UT code for WoS article

000605332200001

EID of the result in the Scopus database

2-s2.0-85098265493