钢的高性能化理论与技术进展

董瀚,廉心桐,胡春东,陆恒昌,彭伟,赵洪山,徐德祥

High Performance Steels: the Scenario of Theoryand Technology

Han DONG,Xintong LIAN,Chundong HU,Hengchang LU,Wei PENG,Hongshan ZHAO,Dexiang XU

表2 钢铁材料常见韧化机制^[42,43]

Table 2 Toughening mechanism in steels^[42,43]

Toughening mechanism	Toughening theory	Toughening nature	Ref.
Cleaning	$δ_{I C} ~ X_{0} (\frac{R_{V}}{R_{I}}) \|_{R_{0}}$	Increase crack nucleation energy	[42]
Refinement of precipitation	$K_{I C} = n E \sqrt[]{2 π λ}$	Increase crack nucleation energy	[43]
Refinement of microstructure	$σ_{f c} = \frac{2 G γ}{k_{s}} d^{- \frac{1}{2}}$	Increase crack propagation energy	[43]
Retained austenite	$K_{I d} = - \frac{3 G b}{2 (1 - ν) \sqrt[]{2 π r}} s i n θ c o s (\frac{θ}{2})$	Increase crack propagation energy	[43]