Synchronous improvement of strength and plasticity (SISP) is realized for the first time in a precipitated-phase strengthened Ni-Co based superalloy through reducing stacking fault energy (SFE). Microstructure characterizations indicate that, with lowering SFE, the dislocation slip mode transforms from wavy to planar slip, meanwhile, the twinnability is also improved. Both the planar slip mode and the increased twinnability enhance the strain-hardening capability of the superalloy, which postpones the initiation of necking. Thus, the SISP in the double-phase superalloy is achieved.

中文翻译：

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同步提高Ni-Co基高温合金的强度和可塑性

通过减少堆垛层错能（SFE），在析出相增强的Ni-Co基高温合金中，首次实现了强度和塑性的同步改进（SISP）。微结构表征表明，随着SFE的降低，位错滑移模式从波浪形滑移到平面滑移，同时孪生性也得到了改善。平面滑模和增加的可缠绕性都增强了高温合金的应变硬化能力，从而延迟了颈缩的开始。因此，实现了双相高温合金中的SISP。