本文研究了Cr_(25)Ni_(20)合金塑性变形过程中的组织变化及其与σ相形成的直接关系。结果表明,再结晶不是促进σ相形成的必要条件。
The microstructure of Cr_(25)Ni_(20) stainless steel under plastic deformation up to 50%has revealed an even distributed twins, microtwins and shear band. The σ-phase formation in800℃ aged specimens is accelerated by its nucleation on either deformed twins or recrystallizedgrain boundaries under less or more deformation respectively. In the recrystallization zone, the rec-rystallization is prior to the precipitation of σ-phase. Although the recrystallization may acceler-ate the formation of σ-phase, yet it is not essential. The twins and microtwins, produced by de-formation, may also provide the additional nucleation sites.
参考文献
| [1] | |
| [2] | Lena A J, Curry W E. Trans ASM, 1955 |
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