Effect of microstructural modification on tensile and fatigue properties of Cu-35wt%Ni-3. 5wt%Cr alloy

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(94)90335-2· OSTI ID:7029252

Wang, G X ^[1]

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1. GKSS Research Center, Geesthacht (Germany). Inst. for Materials Research

Tensile and fatigue properties of Cu-35wt%Ni-3.5wt%Cr in four different material conditions have been investigated. It is shown that reduced grain size and enhanced dislocation density lead to an increase in tensile as well as fatigue strength of solution treated specimens. In the presence of precipitates, tensile properties are less dependent on grain size. Similar to tensile strength, LCF strength is improved by precipitation hardening. However, for large-grained material, the effect of precipitation hardening in the HCF region is reduced due to pronounced intergranular cracking. On the other hand, the intergranular cracking can be reduced by grain refinement, so that an improvement of HCF properties is then possible while taking advantage of precipitation hardening. Results obtained by TEM-investigation of deformed specimens are also discussed in connection with deformation behaviors of the material conditions.

• OSTI ID: 7029252
• Journal Information: Acta Metallurgica et Materialia; (United States), Vol. 42:7; ISSN 0956-7151
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
FATIGUE
MICROSTRUCTURE
TENSILE PROPERTIES
COPPER BASE ALLOYS
NICKEL ALLOYS
CRACK PROPAGATION
DEFORMATION
EXPERIMENTAL DATA
TRANSMISSION ELECTRON MICROSCOPY
ALLOYS
COPPER ALLOYS
DATA
ELECTRON MICROSCOPY
INFORMATION
MECHANICAL PROPERTIES
MICROSCOPY
NUMERICAL DATA
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies