Compositional effects on the cyclic oxidation resistance of conventional superalloys
Compositional effects on the cyclic oxidation resistance of conventional superalloys
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成分对传统高温合金抗循环氧化性能的影响
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
P. Bonacuse
中科院分区：
文献类型：
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作者：
J. Smialek;P. Bonacuse
摘要从广泛的数据库中汇编了25种镍基商用和开发合金的1100 °C循环氧化性能，并根据200 h的重量变化进行了排名。高温合金的循环氧化性能直接受成分的控制。这些常规铸造的高温合金由基本元素[Ni-Co-Cr-Al]、难熔元素[Nb-Mo-Ta-W]、氧活性元素[Ti-Zr-Hf]、轻元素[B、C]和偶尔的[V-Mn-Si]以及P和S微量杂质组成。氧化结果被广泛归类为具有高5-6% Al和3-9% Ta以及低≤ 1% Ti（wt.%）的合金的重量损失小于4 mg/cm 2。相反，200-300 mg/cm 2的重量损失表征含有低< 3.5% Al、无Ta和高> 3% Ti的合金。这些趋势与以前报告的有益和有害的规模阶段。一个明确的铬效应被掩盖，因为它的强耦合，但逆，与Al的相关性。多元线性回归被用来拟合合金成分的一个简单的对数重量变化变换。该函数包含10项，并产生了相关系数r2为0.84。各种图形表示有助于进一步说明，量化和预测10元素组成空间内的复杂氧化作用。
Abstract The 1100 °C cyclic oxidation performance of 25 Ni-base commercial and developmental alloys was compiled from an extensive database and ranked according to the 200 h weight change. Cyclic oxidation performance of superalloys is directly controlled by composition. These conventionally cast superalloys were composed of base elements [Ni–Co–Cr–Al], refractory elements [Nb–Mo–Ta–W], oxygen-active elements [Ti–Zr–Hf], light elements [B,C], and occasionally [V–Mn–Si], with P and S trace impurities. The oxidation results were broadly categorised as less than 4 mg/cm2 weight loss for alloys with high 5–6% Al and 3–9% Ta, and with low ≤ 1% Ti (wt.%). Conversely, weight loss of 200–300 mg/cm2 characterised alloys containing low < 3.5% Al, no Ta, and high > 3% Ti. These trends correlated with beneficial and detrimental scale phases previously reported. An unambiguous Cr effect was masked because of its strongly coupled, but inverse, correlation with Al. Multiple linear regression was used to fit alloy composition to a simple logarithmic weight change transform. The function contained 10 terms and yielded a correlation coefficient, r2, of 0.84. Various graphical representations helped to further illustrate, quantify, and predict complex oxidation effects within a 10-element compositional space.