Open AccessOn Deformation Behaviour of Polycrystalline Iridium at Room Temperature
Author(s) -
Peter Panfilov,
Irina Milenina,
Dmitry Zaytsev,
Alexander Yermakov
Publication year - 2021
Publication title -
johnson matthey technology review
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.571
H-Index - 49
ISSN - 2056-5135
DOI - 10.1595/205651320x15815921428640
Subject(s) - necking , iridium , materials science , brittleness , plasticity , crystallite , deformation (meteorology) , transgranular fracture , composite material , grain boundary , fracture (geology) , lamella (surface anatomy) , metallurgy , microstructure , chemistry , intergranular fracture , biochemistry , catalysis
Deformation and fracture behaviour of the cold drawing iridium wire under tension at room temperature is examined. The high pure polycrystalline iridium was manufactured with the usage of the pirometallurgical technology. On the initial stage of the cold rolling, iridium wire has usual grain structure and exhibits the brittle deformation behaviour: a poor plasticity and the brittle transgranular fracture. However, the wire begins demonstrating the high plasticity including necking in spite of the brittle fracture mode when the lamella structure has been formed in iridium during the cold drawing.