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在250℃以■=0.025min~(-1)测到的 Zn-5%Al 合金的超塑性 m-δ曲线均属式。w_0/l_0值加大使 m_0,m_L 和δ_F 值增大,但对δ_L 和 m_F 值无大影响。试样厚度的加大(由1增大到2mm)仅使δ_L 和δ_F 值增大,考虑 w_0/l_0比值的影响,C_3~((m_0-m_L))-(m_L=m_(mas))型C.L.m-δ方程式规划为:或其中,m′_0(W_0/l_0)=m_0,m′_0>m_0;m′_L(w_0/l_0)=m_L,m′_L>m。w_0/l_0=0.15—0.39。当w_O/l_0=1时,缺口效应消失,δ(或δ_F)值为最大。
The superplastic m-δ curves of Zn-5% Al alloy measured at 250 ℃ with ■ = 0.025min ~ (-1) all belong to the formula. Increasing the value of w_0 / l_0 increases the values of m_0, m_L and δ_F, but has no significant effect on the values of δ_L and m_F. The increase of the sample thickness (from 1 to 2 mm) only increases the values of δ_L and δ_F. Considering the influence of the ratio of w_0 / l_0, C_3 ~ ((m_0-m_L) - (m_L = m_max) The CLm-δ equation is formulated as follows: where m’_0 (W_0 / l_0) = m_0, m’_0> m_0; m’_L (w_0 / l_0) = m_L, m’_L> m. w_0 / l_0 = 0.15-0.39. When w_O / l_0 = 1, the notch effect disappears and the value of δ (or δ_F) is the maximum.