偏析干预下体心立方金属再结晶织构竞争

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偏析干预下体心立方金属再结晶织构竞争

常松涛, 张芳, 沙玉辉, 左良

Recrystallization Texture Competition Mediated by Segregation Element in Body-Centered Cubic Metals

CHANG Songtao, ZHANG Fang, SHA Yuhui, ZUO Liang

表1 Fe-3%Si合金再结晶行为模拟用参数^{[23,26,30~35]}

Table 1 List of parameters for simulating recrystallization behavior of Fe-3%Si alloy^{[23,26,30-35]}

Parameter	Value	Unit	Ref.
Temperature, T	1123	K
Shear modulus, G	87.88 - 0.02467T	GPa	[30]
Boltzmann's constant, k_b	1.38 × 10^-23	J·K^-1
Burgers vector modulus, b	0.25 × 10^-9	m	[30]
Mobility of free grain boundary, $M_{f r e e}^{g b}$	$9 \times 10^{- 8} e x p (\frac{- 1.99 \times 10^{- 19}}{k_{b} T})$	m⁴·J^-1·s^-1	[31]
Mobility of free sub-grain boundary, $M_{f r e e}^{s u b}$	0.2 $M_{f r e e}^{g b}$	m⁴·J^-1·s^-1	[23]
Grain boundary width, δ^gb	1 × 10^-9	m	[26]
Sub-grain boundary width, δ^sub	δ^gb	m	This work
Number of atoms per unit volume, N_V	8.45 × 10²⁸	m^-3
Binding energy of Sb to sub-grain boundary, $E_{s e g}^{s u b}$	-0.43	eV	[32,33]
Binding energy of Sb to grain boundary, $E_{s e g}^{g b}$	-0.67	eV	[34]
Sb bulk diffusion coefficient, D_B	$1.3 \times 10^{- 5} e x p (\frac{- 3.37 \times 10^{- 19}}{k_{b} T})$	m²·s^-1	[35]
Sb cross grain boundary diffusion coefficient, $D_{C}^{g b}$	2D_B	m²·s^-1	[26]
Sb cross sub-grain boundary diffusion coefficient, $D_{C}^{s u b}$	$D_{C}^{g b}$	m²·s^-1	This work