In-situ neutron diffraction study of non-equilibrium phase transformation in advanced high-strength steels

被引：0

作者：

Yu, Zhenzhen ^{[1
]}

Feng, Zhili ^{[1
]}

An, Ke ^{[1
]}

Zhang, Wei ^{[1
]}

Specht, Eliot D. ^{[1
]}

Chen, Jian ^{[1
]}

Wang, Xun-li ^{[1
]}

David, Stan ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

TRENDS IN WELDING RESEARCH: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE | 2013年

关键词：

Phase transformation; AHSS steels; neutron diffraction; martensite; ferrite; POWDER DIFFRACTION; AUSTENITE; PERFORMANCE; COMPOSITES; BEHAVIOR; WELDS;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of heating rate on the phase transformation kinetics from ferrite (alpha) and martensite (alpha(M)) to austenite (gamma) in advanced high-strength steels (AHSS) was investigated. With the unique stroboscopic pump-probe neutron diffraction technique, a time-resolution of 0.1 second or less, corresponding to a time increment of 3 degrees C or less, was achieved. A trend was clearly observed indicating that higher heating rate causes a wider and higher temperature range for the alpha to gamma transformation. The lattice spacing change associated with the austenite formation on heating was obtained as well, which decreases at the early stage of transformation process and increases at the latter stage as a function of temperature. The kinetics governing such observed non-equilibrium phase transformation phenomena is discussed.

引用

页码：506 / 509

页数：4

共 18 条

[1] A new stroboscopic neutron diffraction method for monitoring materials subjected to cyclic loads: Thermal cycling of metal matrix composites [J].