In situ neutron diffraction of heavily drawn steel wires with ultra-high strength under tensile loading

2005 ◽  
Vol 53 (2) ◽  
pp. 463-467 ◽  
Author(s):  
Y. Tomota ◽  
T. Suzuki ◽  
A. Kanie ◽  
Y. Shiota ◽  
M. Uno ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
High Strength ◽  
Tensile Loading ◽  
Steel Wires ◽  
In Situ Neutron Diffraction

Dissolution of Cementite Plates by Drawing, Re-Precipitation with Annealing and Corresponding Changes in Tensile Behavior in a Pearlite Steel

2006 ◽  
Vol 118 ◽  
pp. 27-30
Author(s):  
Y. Shiota ◽  
A. Kanie ◽  
Yo Tomota ◽  
Stefanus Harjo ◽  
Atsushi Moriai ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Load Transfer ◽  
Tensile Loading ◽  
Strengthening Mechanism ◽  
Tensile Behavior ◽  
Microstructural Change ◽  
Subsequent Annealing ◽  
Main Mechanism ◽  
In Situ Neutron Diffraction

The microstructural change with drawing and subsequent annealing for a patented pearlite steel was investigated by means of neutron diffraction. The dissolution of cementite plates with drawing and re-precipitation of spherical cementite particles with annealing after sever drawing were observed. In situ neutron diffraction during tensile loading was performed and it is revealed that the strengthening mechanism of the specimen without cementite differs from that for a ferrite-cementite steel where the load transfer is a main mechanism. The possible strengthening mechanism for the heavily drawn specimen is proposed.

In Situ Neutron Diffraction Studies of Phase Transformations in Si - Mn TRIP Steel

2005 ◽  
Vol 490-491 ◽  
pp. 275-280
Author(s):  
O. Muránsky ◽  
Petr Lukáš ◽  
Petr Šittner ◽  
Jozef Zrník ◽  
P. Jenčuš ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Trip Steel ◽  
High Strength ◽  
Phase Evolution ◽  
In Situ Monitoring ◽  
Trip Steels ◽  
Bainite Microstructure ◽  
In Situ Neutron Diffraction ◽  
Strength And Ductility

High strength and ductility of the TRIP steels is often attributed to the transformation induced plasticity effect resulting from the strain induced martensitic transformation of the retained austenite in the bainite microstructure. The present work reports results of in-situ neutron diffraction experiments focused on monitoring the phase evolution in two TRIP steel samples (two different thermomechanical treatments) subjected to tensile loading at room temperature. Comparison of the single lineprofile analysis of reactor data (TKSN-400 at NPI Rez) and multi lineprofile analysis of data obtained at spallation neutron source (diffractometer ENGIN-X at ISIS RAL Chilton) suggests that the former can be used in the first approximation for in-situ monitoring of the phase evolution in TRIP steels subjected to mechanical loads.

In Situ Neutron Diffraction Study on the Mechanical Behavior of an Ultra-Fine-Grained Steel

2006 ◽  
Vol 524-525 ◽  
pp. 639-644 ◽  
Author(s):  
Kai Xiang Tao ◽  
Hahn Choo ◽  
H. Li ◽  
Bjørn Clausen ◽  
Donald W. Brown ◽  
...  
Keyword(s):  
Grain Size ◽  
Neutron Diffraction ◽  
High Strength ◽  
Neutron Diffraction Study ◽  
Coarse Grained ◽  
Transformation Induced Plasticity ◽  
Fine Grained ◽  
High Elongation ◽  
In Situ Neutron Diffraction

The martensitic phase transformation in an ultra fine grained (UFG) TRIP (transformation induced plasticity) steel with combination of high strength and high elongation was investigated during room temperature tensile test using in situ neutron diffraction. Two types of specimens, namely coarse grained (grain size of about 50 μm) and ultra-fine-grained (grain size of about 350 nm) specimens were examined. The lattice strain evolution of the austenite and martensite phases was observed and the load partitioning between the phases was identified.

scholarly journals A study on the micromechanical behavior of Ti-55531 titanium alloy with lamellar microstructure by in-situ neutron diffraction

2020 ◽  
Vol 321 ◽  
pp. 11013
Author(s):  
Yimin Cui ◽  
Chaohua Li ◽  
Stefanus Harjo ◽  
Changsheng Zhang ◽  
Runguang Li ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Neutron Diffraction ◽  
Lamellar Microstructure ◽  
High Strength ◽  
Aviation Industry ◽  
Heavy Component ◽  
Stress Partitioning ◽  
In Situ Neutron Diffraction ◽  
Strength And Ductility

High strength titanium alloys are promising materials for heavy component parts in the aviation industry. The limited combination of strength and ductility requires an understanding of deformation and stress partitioning between constituent phases. The micromechanical behaviors of Ti-55531 titanium alloy with lamellar microstructure are investigated by in-situ neutron diffraction. The phase strain and lattice strain evolution of α and β phase at loading direction and transverse direction are determined. The results show that the micromechanical behaviors of oriented grains of α and β phase are obviously different. Furthermore, the stress partitioning between α and β phase during the deformation is clearly illustrated. It is found that the β matrix is subjected to higher stress than α precipitates. In addition, the intergranular and interphase microstress is quantitatively characterized. It is found that the intergranular microstress in the β phase grains is predominant among these microstresses. Combining the in-situ neutron diffraction with microstructure characterization, the present work provides a guide for further microstructure optimization.

Study of tempering behavior of lath martensite using in situ neutron diffraction

2015 ◽  
Vol 107 ◽  
pp. 29-32 ◽  
Author(s):  
Z.M. Shi ◽  
W. Gong ◽  
Y. Tomota ◽  
S. Harjo ◽  
J. Li ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Lath Martensite ◽  
In Situ Neutron Diffraction
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