中文摘要：

Ni ₄₃ 公司 ₇ Mn ₃₉ 多晶的合金由融化方法的一条弧制作了的 Sn ₁₁ 被扫描电子调查显微镜学(SEM ) ，精力散的 X 光检查光谱学(版本) ，和微分扫描热量测定(DSC ) 。因为团结，考试在树枝状的当演员组结构显示严重化学分离的存在。这化学分离完全阻碍内在的 martensitic 转变。为 24 h 在 1223 K 退火作为退火的阀值被识别消除微结构分离并且开始 martensitic 转变，，的状况由一个宽广、阴暗的特征显示了。为 2448 h 在 1273 K 退火被发现在显著地支持 martensitic 转变有效，但是 martensitic 转变展出一个多重步的特征。完全的同质被为 72 h 在 1273 K 退火完成，它生产锋利的、单个步的 martensitic 转变。微结构进化和合金(e/a 比率) 的原子价电子集中被评估，它合金的组合同质的学位是反射的，证实高退火温度和长成立时间是重要的揭示这合金的内在的 martensitic 行为。足够地一致的合金在 292 K 和 11.2 J/g 的热含量显示 martensitic 转变。

英文摘要：

The effect of solution treatment on the martensitic transformation behavior of a Ni43Co7Mn39Sn11 polycrystalline alloy fabricated by an arc melting method was investigated by scanning electron microscopy（SEM）, energy-dispersive X-ray spectroscopy（EDS）, and differential scanning calorimetry（DSC）. The examination indicates the presence of severe chemical segregation in the dendritic as-cast structure because of solidification. This chemical segregation completely impedes the intrinsic martensitic transformation. Annealing at 1223 K for 24 h is identified as the threshold annealing condition to eliminate the microstructural segregation and begin the martensitic transformation, as indicated by a broad and obscure feature. Annealing at 1273 K for 24–48 h is found to be effective at promoting notably the martensitic transformation, but the martensitic transformation exhibits a multiple-step feature. Complete homogeneity is achieved by annealing at 1273 K for 72 h, which produces a sharp, single-step martensitic transformation. The microstructural evolution and the valence electron concentrations of alloys（e/a ratio） are evaluated, which are reflective of the degree of compositional homogeneity of alloys, confirming that high annealing temperature and long holding time are vital to reveal the intrinsic martensitic behavior of this alloy. The adequately homogenized alloy displays a martensitic transformation at 292 K and an enthalpy of 11.2 J/g.