The effect of Ni on microstructure, elemental partition behavior, phase solvus temperature, lattice misfit between and phases, and mechanical properties of the Co-8Ti-11V-xNi alloys was investigated. The result shows that the lattice misfit in the alloys decreases from 0.74% to 0.61% as the Ni content increases from 0 to 10%, and the average sizes of the cuboidal phase were measured to be 312.10 nm, 112.86 nm, and 141.84 nm for the Co-8Ti-11V, Co-8Ti-11V-5Ni, and Co-8Ti-11V-10Ni, respectively. Ti, V, and Ni exhibit a slight tendency to partition into the phase, while Co shows a slight tendency to partition into the phase. The solvus temperatures of the phase were measured to be 1167°C, 1114°C, and 1108°C for the Co-8Ti-11V, Co-8Ti-11V-5Ni, and Co-8Ti-11V-10Ni alloys, respectively, by using differential scanning calorimetry (DSC). Moreover, the yield strength and ultimate strength of the Co-8Ti-11V, Co-8Ti-11V-5Ni, and Co-8Ti-11V-10Ni alloys were investigated, and the yield strength and ultimate strength of the 10Ni alloy were highest, at 219 MPa and 240 MPa. After compression at 1000°C, the dislocations cannot effectively shear the phase in the 0Ni and 10Ni alloys, resulting in a relatively high compressive strength of the 0Ni and 10Ni alloys. However, the phase of the 5Ni alloy is no longer visible, and its strength is the lowest.

中文翻译：

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Ni对Co-Ti-V基高温合金组织和力学性能的影响

研究了Ni对Co-8Ti-11V-xNi合金的微观结构，元素分配行为，相固溶温度，相和相之间的晶格失配以及力学性能的影响。结果表明，随着Ni含量从0增加到10％，合金中的晶格失配率从0.74％降低到0.61％，立方晶相的平均尺寸分别为312.10 nm，112.86 nm和141.84 nm。分别为Co-8Ti-11V，Co-8Ti-11V-5Ni和Co-8Ti-11V-10Ni。Ti，V和Ni显示出少量分配到相中的趋势，而Co显示出轻微分配到相中的趋势。的固溶温度使用差示扫描量热法测得Co-8Ti-11V，Co-8Ti-11V-5Ni和Co-8Ti-11V-10Ni合金的相分别为1167°C，1114°C和1108°C （DSC）。此外，研究了Co-8Ti-11V，Co-8Ti-11V-5Ni和Co-8Ti-11V-10Ni合金的屈服强度和极限强度，其中10Ni合金的屈服强度和极限强度最高，在219兆帕和240兆帕的压力下 在1000°C压缩后，位错无法有效剪切0Ni和10Ni合金中的相，从而导致0Ni和10Ni合金具有相对较高的压缩强度。但是，5Ni合金的相不再可见，并且其强度最低。