Abstract
Ultrastrong pure iron wires have been produced with a strength of 1.8
GPa with a strain of 10.35. Based on microstructural observation and
quantified structural parameters, the strengthening mechanisms and
strength-structure relationship have been analyzed. It is found that the
<110> fiber texture intensity, boundary spacing and boundary
misorientation tend to saturation due to the boundary junction motion
when the drawing strain exceeds 8.89. The dislocation density in the
ferrite cells/lamellae increases to ~ 3.6 × 1015 m−2
at a drawing strain of 10.35 without saturation. Based on the
systematic microstructural characterization and quantification, the d−1 or (2d)−0.5 boundary strengthening plus forest hardening are discussed.
Original language | English |
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Article number | 113906 |
Journal | Scripta Materialia |
Volume | 200 |
Number of pages | 7 |
ISSN | 1359-6462 |
DOIs | |
Publication status | Published - 2021 |
Keywords
- Cold drawing
- Pure iron wires
- Strength-structure relationship
- Strengthening mechanisms