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总结了关于spinodal分解形成调幅组织、使合金强化机制的有限文献,发现合金时效后的屈服强度主要依赖于2个沉淀相的成分差(可由点阵常数差△a来表征)造成的应力场,而不依赖于调幅波长和沉淀相的体积分数.但时效过程中,合金的屈服强度与Δa的变化不呈线性关系.本文作者认为这和时效时调幅组织的周期性局部被破坏,使局部产生应力场的改变有关,提出屈服强度公式:σ_c=(MBΔa)/a,其中M包括Taylor因子(或Schmidt因子)和弹性模量项,B表示局部应力场改变(Δa)/a效果的因子,Δa为两沉淀相的点阵常数差,a为点阵常数平均值.此式及B值还待验证和估算.
Summarize the limited literature about spinodal decomposition to form AM and make the mechanism of alloy strengthening. It is found that the yield strength of alloy after aging mainly depends on the stress field caused by the difference of composition of two precipitated phases, which can be characterized by lattice constant difference △ a, But does not depend on the amplitude modulation wavelength and the volume fraction of the precipitated phase.But the aging process, the yield strength of the alloy and the change of Δa is not linear relationship.The authors believe that this and the aging of the amplitude modulation periodical local destruction, the local production Σ_c = (MBΔa) / a, where M includes the Taylor factor (or Schmidt factor) and the elastic modulus term, B denotes the factor of the local stress field change (Δa) / a effect, Δa is the lattice constant difference between the two precipitated phases, and a is the average of the lattice constants. This equation and the B value are yet to be validated and estimated.