TEM of nanostructured metals and alloys

被引：15

作者：

Karnthaler, HP ^{[1
]}

Waitz, T ^{[1
]}

Rentenberger, C ^{[1
]}

Mingler, B ^{[1
]}

机构：

[1] Univ Vienna, Inst Mat Phys, A-1090 Vienna, Austria

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 387卷

基金：

奥地利科学基金会;

关键词：

nanostructured alloys; martensitic transformations; MgSi precipitates; Co alloys; disordered Ni3Al; bulk amorphous NiTi; TEM;

D O I：

10.1016/j.msea.2004.01.125

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Nanostructuring has been used to improve the mechanical properties of bulk metals and alloys. Transmission electron microscopy (TEM) including atomic resolution is therefore appropriate to study these nanostructures; four examples are given as follows. (1) The early stages of precipitation at RT were investigated in an Al-Mg-Si alloy. By high resolution TEM it is shown that the precipitates lie on (0 0 1) planes having an ordered structure. (2) In Co alloys the fronts of martensitic phase transformations were analysed showing that the transformation strains are very small thus causing no surface relief. (3) Re-ordering and recrystallization were studied by in situ TEM of an Ni3Al alloy being nanocrystalline after severe plastic deformation. (4) In NiTi severe plastic deformation is leading to the formation of amorphous shear bands. From the TEM analysis it is concluded that the amorphization is caused by plastic shear instability starting in the shear bands. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：777 / 782

页数：6

共 19 条

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