Dynamic embrittlement in an age-hardenable copper-chromium alloy

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00098-X· OSTI ID:271658

Misra, R D.K.; Prasad, V S ^[1]; Rao, P R ^[2]

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1. Defence Metallurgical Research Lab., Hyderabad (India)
2. Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore (India)

Copper containing up to {approximately}1 weight % chromium is a precipitation hardening alloy exhibiting good room temperature strength, ductility and high electrical and thermal conductivity. Age-hardenable Cu-Cr alloys have been found to suffer from embrittlement in the temperature range 400--800 K. Grain boundary segregation of sulfur has been suggested to be the cause. Minor additions of Zr and Ti have been found to significantly improve the hot ductility of these alloys and this has been attributed to scavenging of grain boundary sulfur as zirconium sulfide. The mechanism of embrittlement during hot deformation processing of Cu-Cr alloy and other copper-based alloys is far from understood and efforts are continuing to understand the embrittlement process in these alloys.

• OSTI ID: 271658
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 1 Vol. 35; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
COPPER BASE ALLOYS
CRACKS
DIFFUSION
EMBRITTLEMENT
GRAIN BOUNDARIES
IMPURITIES
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
PRECIPITATION
SEGREGATION