The nature of intergranular embrittlement in quenched FeMn alloys

1978 ◽  
Vol 12 (4) ◽  
pp. 377-380 ◽  
Author(s):  
B.C. Edwards ◽  
M. Nasim ◽  
E.A. Wilson
Keyword(s):  
Intergranular Embrittlement

Intergranular embrittlement of iron by phosphorus segregation: an atomistic simulation

2013 ◽  
Vol 21 (2) ◽  
pp. 025012 ◽  
Author(s):  
Won-Seok Ko ◽  
Jong Bae Jeon ◽  
Chang-Hoon Lee ◽  
Jae-Kon Lee ◽  
Byeong-Joo Lee
Keyword(s):  
Atomistic Simulation ◽  
Phosphorus Segregation ◽  
Intergranular Embrittlement

Brian Eyre CBE FREng. 29 November 1933 — 28 July 2014

2016 ◽  
Vol 62 ◽  
pp. 147-166
Author(s):  
Derek Pooley ◽  
George Smith ◽  
Colin Windsor
Keyword(s):  
Nuclear Power ◽  
Chief Executive ◽  
Structural Components ◽  
Theoretical Understanding ◽  
Leading Role ◽  
Void Swelling ◽  
Intergranular Embrittlement ◽  
Wide Range ◽  
East End ◽  
The Uk

Brian Eyre was an outstanding metallurgist who played a leading role in the development of nuclear engineering materials. His experiments on irradiated metals enabled a theoretical understanding of the mechanisms of radiation damage, and in particular the formation of voids and void swelling in structural steels. His work on the fracture of metals advanced our understanding of intergranular embrittlement and helped define the specifications of the structural components in nuclear reactors. He rose from a humble upbringing in London's East End to become Chief Executive of the UK Atomic Energy Authority (UKAEA). He was instrumental in transforming the UKAEA from a organization whose mission was to develop nuclear power generating systems into the privatized AEA Technology, which worked on a wide range of technologies on a customer–contractor basis.

Micromechanical Aspects of Transgranular and Intergranular Failure Competition

2011 ◽  
Vol 465 ◽  
pp. 399-402 ◽  
Author(s):  
Ivo Dlouhy ◽  
Mita Tarafder ◽  
Hynek Hadraba
Keyword(s):  
Fracture Initiation ◽  
Type Specimens ◽  
Fracture Surface Roughness ◽  
Three Point Bending ◽  
Intergranular Embrittlement ◽  
Initiation And Propagation ◽  
Fracture Micromechanism ◽  
High Level ◽  
Impurity Elements ◽  
Determine Fracture Toughness

Quantification of characteristics that govern intergranular fracture initiation and propagation of this fracture micromechanism in competition with cleavage one is main aim of the paper. A NiCr steel of commercial quality and the same steel with an increased content of impurity elements, Sn and Sb, were used. Step cooling ageing was applied in order to induce intergranular embrittlement. Standard and pre-cracked Charpy type specimens were both tested in three-point bending to determine fracture toughness characteristics. In order to characterise the quantitative differences in fracture surfaces roughness a fractal analysis was applied. A boundary level of fractal dimension has been determined to be 1.12: fracture surface roughness with a higher value reflects high level of intergranular embrittlement and thus fracture resistance degradation.

Influences of Severe Deformation and Alloy Modification on Secondary Hardening and Fracture Behavior

2005 ◽  
Vol 475-479 ◽  
pp. 183-186 ◽  
Author(s):  
Ho Sup Sim ◽  
K.S. Lee ◽  
Kon Bae Lee ◽  
Hyung Ryul Yang ◽  
Hoon Kwon
Keyword(s):  
High Temperature ◽  
Impact Toughness ◽  
Fracture Behavior ◽  
Secondary Hardening ◽  
Direct Quenching ◽  
Severe Deformation ◽  
Intergranular Embrittlement ◽  
Cr Addition ◽  
Aging Kinetics ◽  
Kinetics Of

Secondary hardening and fracture behavior in the high Co-Ni steels containing W, has been studied in terms of severe deformation, Cr addition, and austenite condition. Two kinds of Co- Ni steels, containing the only W(W steel), and the W and Cr(WCr steel), were severely rolled and followed by direct quenching(DQ). In comparison with undeformed specimens, reaustenitizing( RA) was performed. DQ specimens exhibited higher impact toughness as well as higher hardness, as compared to RA specimens. The aging kinetics of the WCr steel was accelerated due to the Cr addition. While the W steel showed the intergranular embrittlement in the high temperature RA condition, in addition, the WCr steel exhibited the transgranular mode of mostly dimple type.

scholarly journals Diffusion-Controlled Liquid Bismuth Induced Intergranular Embrittlement of Copper

2005 ◽  
Vol 237-240 ◽  
pp. 683-688 ◽  
Author(s):  
V. Laporte ◽  
Krzysztof Wolski ◽  
Pascal Berger ◽  
A. Terlain ◽  
Gerard Santarini
Keyword(s):  
Grain Boundary ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Boundary Diffusion ◽  
Coupling Effect ◽  
Boundary Concentration ◽  
Liquid Bismuth ◽  
Intergranular Embrittlement ◽  
Diffusion Controlled ◽  
Grain Boundary Wetting

The consequences of the contact between liquid bismuth and a copper bicrystal are investigated at 500°C. Atoms of bismuth are shown to penetrate and embritlle the copper grain boundary. Grain boundary concentration profiles of bismuth are obtained on fracture surfaces by both Auger electron spectroscopy and He4+ Rutherford backscattering spectroscopy. The maximum bismuth intergranular concentration is calculated from experimental data to be about 1.7 monolayers (near the liquid bismuth / solid copper interface). The overall profiles are significantly different from typical erfc profiles and an interpretation is proposed, based on the coupling effect between grain boundary diffusion and non-linear segregation. These results allow us to conclude on the absence of grain boundary wetting for the Cu / Bi system at 500°C.

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