鋁、鈦、鋯元素添加對MAR-M247鎳基超合金機械性質之影響

Effect of Aluminum /Titanium/ Zirconium Addition on Mechanical Properties of MAR-M247 Nickel-based Superalloy

王錫九(S.J. Wang) ； 鍾啟睿(C.J. Chung) ； 蔡佑政(Y.C. Tsai) ； 張宸瑋(C.W. Chang) ； 蘇湘允(H.Y. Su) ； 陳適範(S.F. Chen) ； 張仲凱(Z.K. Zhang) ； 薄慧雲(H.Y. Bor)

《鑛冶：中國鑛冶工程學會會刊》 65卷4期 (2021/12) Pp. 55-64

https://doi.org/10.30069/MM.202112_65(4).04

摘要

本研究透過添加元素的方式來調整鎳基超合金MAR-M247內的各元素比例，觀察其對合金機械性質的影響。添加元素選擇鋁鈦鋯三種元素，實驗設計一共5個樣本（母材、M1、M2、M3、M4），各樣品內的成分比例皆不相同。由實驗結果可觀察到M3、M4由於鈦元素比例較高而降低了合金密度，達到輕量化的效果。在高溫拉伸試驗中，經元素添加後的樣本在碳化物型貌的細化與分散、部分樣本的晶粒尺寸有縮小的情形，γ'相組織含量的增加進而加強了析出強化的效果等因素，高溫抗拉強度皆有獲得提升，M4樣本有最佳高溫抗拉強度（555 MPa），相較於母材（505 MPa）提升了約9.9% 左右。潛變測試中（982°C/200 MPa），除M3樣本外其餘樣本之破斷壽命皆有獲得提升，其中以M2的破斷壽命（122.75 hrs）為最佳，造成M3破斷壽命下降的原因為因樣本內孔洞較多，進而使其潛變性能下降。

關鍵字

MAR-M247 ； 鎳基超合金 ； 元素添加 ； 抗拉強度 ； 潛變性質

並列摘要

In this study, the proportion of elements in the nickel-based superalloy MAR-M247 was adjusted by adding elements to investigate its effects on the mechanical properties of the alloy. Three elements: aluminum, titanium and zirconium were selected as the added elements. The experimental design were total of 5 samples (base material, M1, M2, M3, M4), and the proportions of ingredients in each sample were different. From the experimental results, it could know that M3 and M4 have lower density due to the higher content of titanium, and achieve the effect of weight-lightening. In pace with the addition of alloying elements, the carbide morphology was refined and dispersed, the grain size was reduced, and the content of the gamma prime phase structure was increased, which in turn improve the high temperature tensile strength. The M4 sample had the best high temperature tensile strength (555 MPa) which was about 9.9% higher than the base material (505 MPa). In the creep test (982°C/200 MPa), the rupture life of the other samples except the M3 sample had been improved. Among them, the rupture life of M2 (122.75 hrs) was the best. The reason for the decrease of the rupture life of M3 is due to its higher porosities, thus deteriorating the creep properties.

並列關鍵字

MAR-M247 ； nickel-based superalloy ； element addition ； tensile strength ； creep property

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