Residual Stress in and Microstructure of Fe and Ti Surface Layers After 1 Mev N+ Implantation at High Dose

1989 ◽  
Vol 157 ◽  
Author(s):  
A.M. Vredenberg ◽  
F.W. Saris ◽  
N.M. v.d. Pers ◽  
P.F. Colijn ◽  
Th.H. de Keijser ◽  
...  
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Stress Analysis ◽  
Peak Concentration ◽  
High Dose ◽  
X Ray Diffraction ◽  
Surface Layers ◽  
Volume Increase ◽  
X Ray ◽  
Nitride Formation

ABSTRACTThe effect of 1 MeV N+ irradiation on the microstructure of Fe and Ti specimens was investigated. The Fe and Ti specimens were implanted such that the N peak concentration (30 at.% in Fe, 45 at.% in Ti), was below the concentration of N in ε-Fe2N and δ-TiN, respectively. X-ray diffraction phase analysis showed that ε-Fe2N and δ-TiN had formed. X-ray diffraction stress analysis indicated that the residual stress in the Fe and Ti matrices was negligible after implantation. This suggests that the volume misfit due to nitride formation had been accommodated by plastic deformation. Indeed, surface profilometry of implanted Fe showed that a volume increase of the specimen had occurred which was compatible with the formation of unstrained nitride .

Wear and Surface Residual Stress Evolution on Twin-Disc Tests of Rail/Wheel Steels

2013 ◽  
Vol 768-769 ◽  
pp. 707-713
Author(s):  
António Castanhola Batista ◽  
Daniel F.C. Peixoto ◽  
Joao P. Nobre ◽  
Luís Coelho ◽  
Diogo Mesquita Ramos ◽  
...  
Keyword(s):  
Residual Stress ◽  
Fatigue Behavior ◽  
Contact Fatigue ◽  
Major Influence ◽  
Stress Evolution ◽  
X Ray Diffraction ◽  
Surface Layers ◽  
Surface Residual Stress ◽  
X Ray ◽  
Initiation And Propagation

Twin disc tribological tests were performed in wheel and rail materials, with specimens taken from a Spanish AVE train wheel and a UIC60 rail, in a program intended to characterize their contact fatigue behavior. The X-ray diffraction technique was used to characterize the residual stress distribution at the initial and damaged stages, as well as in intermediate stages, since existing residual stresses in the surface layers of the railways steels and its evolution during contact loading can have a major influence on crack initiation and propagation.

Comparison of the hole-drilling and X-ray diffraction methods for measuring the residual stresses in shot-peened aluminium alloys

2005 ◽  
Vol 40 (2) ◽  
pp. 199-209 ◽  
Author(s):  
V Fontanari ◽  
F Frendo ◽  
Th Bortolamedi ◽  
P Scardi
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Surface Layer ◽  
Hole Drilling ◽  
X Ray Diffraction ◽  
Residual Stress Field ◽  
X Ray ◽  
Sources Of Uncertainty ◽  
Stress Profiles ◽  
Good Agreement

The incremental blind hole-drilling and the X-ray diffraction methods were used to measure the residual stress field introduced by shot peening in aluminium alloy 6082-T5 plates. Two peening treatments were selected to produce different depth extensions and peak values arising from different extents of plastic deformation in the surface layer. The results are discussed considering the various sources of uncertainty; in addition to the measuring technique, the effects of the surface treatment that usually induces a strong plastic deformation in the surface layer resulting in material work hardening and worsening of the surface morphology were considered. The residual stress profiles determined by the two methods showed quite good agreement for the two conditions, as regards the values both of the compressive peak and of the penetration depth. The present results provide mutual confirmation of the effectiveness of the two methods for the study of this class of materials.

Residual stress analysis in aged graphite/PMR-15 composites using X-ray diffraction

2006 ◽  
Vol 421 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
B. Benedikt ◽  
M. Lewis ◽  
P. Rangaswamy ◽  
M. Kumosa ◽  
P. Predecki ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Residual Stress Analysis

Non-Destructive Residual Stress Analysis of Induction Hardened Components by Neutron and X-Ray Diffraction

2013 ◽  
Vol 768-769 ◽  
pp. 420-427 ◽  
Author(s):  
Jeremy Epp ◽  
Thilo Pirling ◽  
Thomas Hirsch
Keyword(s):  
Residual Stress ◽  
Chemical Composition ◽  
Residual Stresses ◽  
Stress Analysis ◽  
Stress Gradient ◽  
X Ray Diffraction ◽  
Neutron Measurement ◽  
X Ray ◽  
Layer Removal ◽  
Residual Stress Analysis

In this paper the microstructural and residual-stress analysis of an induction hardened plate of medium carbon steel is described. The stress gradient was determined using laboratory X-ray diffraction (IWT, Bremen, Germany) and neutron strain scanning (ILL, Grenoble, France). Due to slight variations of chemical composition in the depth, matchstick like (cross section 2×2mm²) d0-reference samples were prepared from a similarly treated sample. The d0shift induced by variation of chemical composition was measured by neutron and by X-ray diffraction along the strain free direction (sin²ψ*) and used for the evaluation of the neutron stress calculation. The d0distribution obtained from the neutron measurement did not appear reliable while the method using X-ray diffraction seems to be an efficient and reliable method to determine d0profiles in small samples. The evaluation of neutron measurements was then done using the X-ray diffraction d0distribution. High compressive residual stresses were measured in the hardened layer followed by high tensile residual stresses in the core. A comparison of the neutron measurements with X-ray diffraction (XRD) depth profiles obtained after successive layer removal showed that both methods give similar results. However, these investigations opened the question about the direct comparison of the residual stresses obtained by neutron and XRD. Indeed, a correction of the neutron data regarding the residual stresses in thickness direction might be necessary as these are released in the case of X-ray diffraction measurements after layer removal.

scholarly journals Residual stress analysis near a cold expanded hole in a textured alclad sheet using X-ray diffraction

2005 ◽  
Vol 45 (1) ◽  
pp. 83-88 ◽  
Author(s):  
J. C. P. Pina ◽  
A. M. Dias ◽  
P. F. P. de Matos ◽  
P. M. G. P. Moreira ◽  
P. M. S. T. de Castro
Keyword(s):  
Residual Stress ◽  
Stress Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Residual Stress Analysis

Ion Implantation of Ti,Mo W,Mo+C and W+C in H13 Steel and Aluminum at Elevated Temperature

1993 ◽  
Vol 316 ◽  
Author(s):  
Zhang Tonghe ◽  
Wei Fuzhong ◽  
Chen Jun ◽  
Zhang huixing ◽  
Zhang Xioji ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Peak Concentration ◽  
Chemical Change ◽  
High Dose ◽  
Second Phase ◽  
Target Temperature ◽  
X Ray Diffraction ◽  
H13 Steel ◽  
X Ray ◽  
Second Phases

ABSTRACTThe chemical change in the surface of H13 steel or aluminum is produced by implanting a reactive elements, such as Ti, Mo and W. The X-ray diffraction pattern shows that implanted Ti at 400 C has reacted with carbon(0.35 in wt.%) forming a second phase TiC. Auger analysis shows that the carbon atoms have been condensed in the Ti implanted region. Carbon peak concentration of 30 At.% is greater than Ti atom peak concentration of 12 At.%.Several second phases are formed during pulsed Mo ion implantation 2 into aluminum with high ion flux of 50˜80µA/cm2 which raises the target temperature from 400°C to 600°C.More second phases are formed by dual Mo+C implantation with high dose of 3˜5×10 17/cm2 and high flux of 50˜75µA/cm2 . And the target temperature is raised from 400 to 600°C. The FeMo Fe3Mo2, Fe2MoC, Mo2C, MoC, MoCx, phases and iron carbides are identified by X-ray diffraction technique.

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