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Effect of networked Cu-rich ferrite phase on proof stress and ultimate tensile strength of sintered bodies of Fe–Cu hybrid-alloyed steel powder with graphite.
- Source :
-
Powder Metallurgy . Apr2021, Vol. 64 Issue 2, p134-141. 8p. - Publication Year :
- 2021
-
Abstract
- To improve the yield strength of powder metallurgy steel, this work investigated the effect of a Cu-rich networked phase. Mixtures of 0.7% graphite and Fe–3% Cu hybrid-alloyed steel powders, composed of pre-alloyed Fe–3 x % Cu particles with diffusion-bonded 3(1 − x) % Cu (0 ≤ x ≤ 1), were processed by high-density compaction and conventional sintering. The maximum values of 0.2% proof stress (YS) and ultimate tensile strength (UTS) were obtained at x = 0.68, where high-density compact with well-networked Cu-rich ferrite phase was developed without Cu growth. Moreover, nanosized ϵ-Cu precipitates were observed in the Cu-rich ferrite. These high YS and UTS were achieved not only by decreases in porosity but also by precipitation strengthening caused by the nanosized ϵ-Cu in the Cu-rich ferrite network. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00325899
- Volume :
- 64
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Powder Metallurgy
- Publication Type :
- Academic Journal
- Accession number :
- 149509209
- Full Text :
- https://doi.org/10.1080/00325899.2021.1871805