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以Spinodal分解为例,说明相变研究的重要意义。铁素体不锈钢中呈现400~550℃时效脆性的原由为Spinodal分解而非有序化。介绍了含不溶区间及Spinodal线的Fe-Cr相图。Mn-Al-C钢奥氏体经Spinodal分解显示抗拉强度和屈服强度分别增至1120 MPa和1080 MPa,伸长率约30%,值得给予关注。Cu-15Ni-8Sn和Cu-15Ni-8Sn-0.2Nb合金由于Spinodal分解和有序析出相呈显著强化,并具良好应力松弛,高的弹性模量和导电性。Cu-Ni-Sn经Spinodal分解还会出现胞状或条状组织,称非连续Spi-nodal分解,铝合金时效时也会发生Spinodal分解,Co45Cu55薄膜通过Spinodal分解显示18%的最大巨磁阻。
Taking Spinodal decomposition as an example, it shows the significance of phase change research. Ferritic stainless steel in the presence of 400 ~ 550 ℃ aging brittleness caused by Spinodal decomposition rather than order. The Fe-Cr phase diagram containing insoluble sections and Spinodal lines is introduced. Austenite Mn-Al-C steel by Spinodal decomposition showed that the tensile strength and yield strength were increased to 1120 MPa and 1080 MPa, elongation of about 30%, merits attention. Cu-15Ni-8Sn and Cu-15Ni-8Sn-0.2Nb alloys are significantly strengthened by Spinodal decomposition and ordered precipitation with good stress relaxation, high elastic modulus and electrical conductivity. The Cu-Ni-Sn can also be disrupted by Spinodal. The disorganization of cells also means that the disintegration of non-continuous Spi-nodal, Spinodal decomposition of the aluminum alloy also occurs during aging, and the Co45Cu55 film shows a maximum reluctance of 18% by Spinodal decomposition.