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Oxi.ati.n Behavi.ur of a Newly Developed Superalloy

Journal of Surface Engi.eered Materi.ls and Advanced Technology 2011年第3期1卷 130-135页

作者： i.V.S. Yashwanth i. gurrappa H. Murakami 不详

The current paper explai.s the oxi.ati.n behavi.ur of a newly developed ni.kel-based superalloy i. si.ulati.g aero gas turbi.e engi.e condi.i.ns. The results showed that the new superalloy i. hi.hly suscepti.le to hi.h temperature oxi.ati.n. Wi.hi. three of hours of oxi.ati.n, extensi.e oxi.e scales were formed. The formed oxi.e scales were ana-lysed wi.h electron di.persi.e spectroscopy (EDS) and morphology was studi.d wi.h scanni.g electron mi.roscope (SEM) for vari.d oxi.ati.n ti.es. The oxi.ati.n products were determi.ed wi.h XRD and cross secti.ns of all the oxi.di.ed superalloys were also studi.d. The elemental di.tri.uti.n of all the superalloys after oxi.ati.n was also studi.d wi.h a vi.w to understand and compare the characteri.ti.s of the new superalloy wi.h other superalloys. Fi.ally, an oxi.ati.n mechani.m that i. responsi.le for i.s faster degradati.n under elevated temperatures was establi.hed based on the results obtai.ed wi.h di.ferent techni.ues and presented i. detai..

关键词： Gas Turbi.e Engi.e Components Superalloys Hi.h Temperature Oxi.ati.n

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The Behavi.ur of Superalloys i. Mari.e Gas Turbi.e Engi.e Condi.i.ns

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Journal of Surface Engi.eered Materi.ls and Advanced Technology 2011年第3期1卷 144-149页

作者： i. gurrappa A. K. Gogi. i. V. S. Yashwanth 不详

Thi. paper presents hot corrosi.n results carri.d out systemati.ally on the selected ni.kel based superalloys such as i. 738 LC, GTM-SU-718 and GTM-SU-263 for mari.e gas turbi.e engi.es both at hi.h and low temperatures that represent type i.and type i. hot corrosi.n respecti.ely. The results were compared wi.h advanced superalloy under si.i.ar condi.i.ns i. order to understand the characteri.ti.s of the selected superalloys. i. i. observed that the selected superalloys are relati.ely more resi.tant to type i.and type i. hot corrosi.n when compared to advanced superalloy. i. fact, the advanced superalloy i. extremely vulnerable to both types of hot corrosi.n. Subsequently, the relevant reacti.n mechani.ms that are responsi.le for slow and faster degradati.n of vari.us superalloys under vari.d hot corrosi.n condi.i.ns were di.cussed. Based on the results obtai.ed wi.h di.ferent techni.ues, a degradati.n mechani.m for all the selected superalloys as well as advanced superalloy under both types of hot corrosi.n condi.i.ns was explai.ed. Fi.ally, the necessi.y as well as developmental efforts wi.h regard to smart corrosi.n resi.tant coati.gs for thei. effecti.e protecti.n under hi.h temperature condi.i.ns was stressed for thei. enhanced effi.i.ncy.

关键词： Mari.e Gas Turbi.es Superalloys Hot Corrosi.n Degradati.n Mechani.m Smart Coati.gs

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活化锡—铝合金中添加铋的影响

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港工技术与管理 1995年第5期 49-52页

作者： gurrappa 陈侃

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