TRANSMISSION ELECTRON-MICROSCOPY STUDY OF MARTENSITES IN LASER-CLAD NI-AL BRONZE ON ALUMINUM-ALLOY AA333

被引：14

作者：

LIU, Y ^{[1
]}

MAZUMDER, J ^{[1
]}

SHIBATA, K ^{[1
]}

机构：

[1] NISSAN MOTOR CO LTD,CENT ENGN LABS,NATSUSHIMA CHO,YOKOSUKA 237,JAPAN

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1994年 / 25卷 / 01期

关键词：

D O I：

10.1007/BF02646672

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and crystal structure of laser-clad Ni-Al bronze on Al alloy AA333 were investigated with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) combined with energy-dispersive X-ray spectroscopy (EDX). The SEM and TEM revealed two kinds of martensites in the clad region: sheet martensite and lath martensite. Selected area diffraction (SAD) analysis showed that the sheet martensite had a close-packed structure with different stacking modulations. Two crystal structure analysis procedures based on a hexagonal unit cell were applied to identify the stacking periods and orders of the sheet martensite. The analysis showed that a nine-layer stacking mode specified as ABCBCACAB was predominant and that an 1 l-layer stacking mode specified as ABCBCACABAB was also locally present. The crystal structure of the lath martensite was identified as face-centered cubic (fcc) by SAD. No ordering of alloying elements was detected in the sheet and lath martensites.

引用

页码：37 / 46

页数：10

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