PHASE-BOUNDARY SEGREGATION IN THE MULTIPHASE-MULTICOMPONENT ALLOY IN-738 STUDIED BY AES AND SEM

被引：2

作者：

KNY, E ^{[1
]}

STOLZ, W ^{[1
]}

STICKLER, R ^{[1
]}

GORETZKI, H ^{[1
]}

机构：

[1] PHYS ELECTR IND GMBH,MUNCHEN 81,FED REP GER

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY | 1980年 / 17卷 / 05期

关键词：

MICROSCOPES; ELECTRON - MICROSCOPIC EXAMINATION - SPECTROSCOPY; AUGER ELECTRON;

D O I：

10.1116/1.570640

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ni-base superalloys which are used in thermodynamically metastable conditions develop an undesired decrease in mechanical strength during service. In situ fracture experiments of aged (10,000 h/788 degree C) and fully heat treated specimens of IN 738 subsequently examined with AES and SEM revealed pronounced segregation of P and S to phase boundaries. In spite of the low levels of these elements in such alloys, a considerable enrichment of S and P was discovered in their interfacial layers. A weakening effect is expected due to interface segregation of these elements. SEM results reveal that the fracture morphology is different for thermally aged and fully heat treated specimens. These SEM results confirm the weakening effect of phase boundaries by segregation.

引用

页码：1208 / 1212

页数：5

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