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Boron-dependent phase transformation and crystallographic features governing impact toughness in the CGHAZ of 1000 MPa grade hydroelectric steel
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DOI：10.1016/j.matchar.2026.116882.png)
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Abstract
En 中文
• B couples with heat input in 1000 MPa steel, optimal CGHAZ at ∼10 ppm B, 35 kJ/cm. • B elevates Ac1/Ac3 and lowers Ms./Mf, enhancing steel hardenability. • B segregates at grain boundaries, refining austenite grains and pinning precipitates. • B weakens bainite variant selection, raising HAGB density for crack resistance.
Keywords:
Hydroelectric steel
Boron element
CGHAZ
Impact toughness
Phase transformation
Crystallography
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5.5
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1.1W
Citations:
3.4W
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