In:
Metallurgical and Materials Transactions A, Springer Science and Business Media LLC, Vol. 49, No. 2 ( 2018-02), p. 604-612
Abstract:
Melt spinning of an Fe-5Y and Fe-1Y-1Ti (wt pct) alloy produced a relatively uniform spatial distribution of Y and Ti in solid solution and ribbons with consistent yield ( 〉 60 pct by weight), fast processing time ( 〈 10 seconds), good scalability (up to 〉 100 g feedstock material), and repeatability. Heat treatment in the presence of Fe 2 O 3 as an oxygen source (Rhines pack method) at 973 K validated the potential of forming 〈 20 nm Y-rich oxides in the Fe-5Y ribbons. Pulverized Fe-1Y-1Y ribbons were consolidated to bulk using the field-assisted sintering technique (FAST) incorporating nano-sized Fe 3 O 4 powder as the oxygen source. After FAST at 1273 K, 50 MPa, and 30 minutes, a comparatively high number density of sub-micron Y and/or Ti-rich oxides were developed. Further formation of fine-scale oxides took place during post-FAST annealing, resulting in an approximate 20 pct increase in hardness at temperatures below 573 K, but with a reduced hardening effect above 673 K due to a small fraction of persistent porosity and mechanically weak prior ribbon boundaries that were decorated with Ti-rich oxides.
Type of Medium:
Online Resource
ISSN:
1073-5623
,
1543-1940
DOI:
10.1007/s11661-017-4398-x
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2018
detail.hit.zdb_id:
1179415-X
detail.hit.zdb_id:
2037517-7
detail.hit.zdb_id:
192156-3
SSG:
19,1
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