Residual Stress Evaluation by X-Ray Diffraction and Hole-Drilling in an API 5L X70 Steel Pipe Bent by Hot Induction

Ceglias, Rodrigo Braga; Alves, Juciane Maria; Botelho, Ramón Alves; Júnior, Eustáquio de Souza Baêta; Santos, Igor Cuzzuol dos; Moraes, Nicki Robbers Darciano Cajueiro de; Oliveira, Rebeca Vieira de; Diniz, Saulo Brinco; Brandão, Luiz Paulo Mendonça

doi:10.1590/1980-5373-mr-2016-0012

Cited by 11 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2021;18:e2453 peaks of condition W80, when compared to the WQ80. These phenomena can be associated with the strain that causes distortion of the lattice parameter and disorder in the atomic structure, promoting residual stresses, which interfere with the path taken by the X-ray beam and thus resulting in displacement of the diffraction peaks [17,18]. The XRD analysis confirms the presence of peaks of the α" phase and also of the β phase, as shown in Figure 1.…”

Section: /6mentioning

confidence: 73%

The effect of cold working and solution heat treatment on microstructure and mechanical behavior of Ti35Nb2.5Sn alloy

Santos¹,

Lima²,

Nascimento³

et al. 2021

Tecnol. Metal. Mater. Min.

View full text Add to dashboard Cite

Recently, β Ti alloys have been extensively studied, due to their advantageous properties. β titanium alloys can exhibit lower elastic modulus and may be produced by elements that do not exhibit cytotoxicity, such as niobium, molybdenum and zirconium. This study aims to evaluate the correlation between cold working and solution heat treatment regarding to the microstructure and hardness of the Ti35Nb2.5Sn alloy. The alloy was arc melted in inert atmosphere and the ingots were hot rolled with 40% reduction. Axial compression samples were then cold worked with 40%, 70%, 80% and 90%. After the cold working, the samples were then divided into two groups. In half of them, solution and quenching treatment was performed. Microstructural characterization was achieved by optical microscopy and X-ray diffraction. Vickers microhardness tests were also evaluated. The microstructural characterization confirmed the presence of β, α" and ω phases. Cold working above 70% reduction provides the increase of microhardness, which can be attributed to the grain refinement and others microstructural features, as the amount of strain induced α", the amount of the ω phase-when it is present, and also by the dislocation density.

show abstract

Section: /6mentioning

confidence: 73%

The effect of cold working and solution heat treatment on microstructure and mechanical behavior of Ti35Nb2.5Sn alloy

Santos¹,

Lima²,

Nascimento³

et al. 2021

Tecnol. Metal. Mater. Min.

View full text Add to dashboard Cite

show abstract

“…In the same way, the crystal lattice does not show changes unless it is affected by stresses 35 . Overall, if a crystalline structure is subjected to tensile stresses, the interplanar spacing decreases perpendicular to the direction of the stresses; therefore, the interplanar spacing could be increased parallel to the direction of the tensile stress 35 . These findings are also in line with our results: when the endodontic files were subjected to SP, the interplanar spacing decreased in the direction parallel to the application of SP.…”

Section: Discussionmentioning

confidence: 81%

Shot peening increases resistance to cyclic fatigue fracture of endodontic files

Nino-Barrera

Sanchez-Aleman

Acosta-Humánez

et al. 2021

Sci Rep

View full text Add to dashboard Cite

The objective of this study was to assess the resistance to fatigue fracture of conventional nickel–titanium files after undergoing shot peening. Forty NITIFLEX endodontic files, number 30, were divided into two groups; one was submitted to shot peening treatment and the other was not. All instruments were tested for fatigue fracture in simulated canals with a TRI-AUTO ZX endodontic motor. One file of each group was subjected to a residual stress analysis by XRD. Finally, the fractured surface was observed and elemental analysis performed by means of SEM and EDX. Roughness analysis was made by focal variation microscope. The shot peening group showed greater resistance to fatigue fracture; there was no difference in the length of the fractured fragments. XRD results showed the presence of residual compression stresses in the file submitted to shot peening, a decrease in the interplanar spacing, and an increase in the full-width-at-half-maximum and the microstrains. SEM and EDX showed a ductile fracture with zones of fatigue and an equiatomic ratio between the nickel and titanium. Surface roughness increased after the file was subjected to the shot peening procedure. In conclusion, shot peening increases the resistance to fatigue fracture due to the presence of residual compression stresses in files manufactured from a conventional nickel–titanium alloy.

show abstract

“…30 The residual stress was also determined by means of XRD, with the same equipment described above, where the scanning was performed on the Bragg θ-2θ geometry ranging from 90 to 100 at 10 s per scan step, as detailed elsewhere. 31,32 The peak displacement was analyzed at 95 , which was determined considering the value of 2θ corresponding to the center of the peak.…”

Section: X-ray Diffractionmentioning

confidence: 99%

Alumina‐toughened zirconia for dental applications: Physicochemical, mechanical, optical, and residual stress characterization after artificial aging

et al. 2020

View full text Add to dashboard Cite

To characterize the physicomechanical properties of an alumina-toughened zirconia (ATZ). ATZ synthesis consisted of the addition of alumina particles in an yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) matrix. Specimens were obtained by uniaxial and isostatic pressing ATZ and 3Y-TZP powders and sintering at 1600 C/1 h and 1550 C/1 h, respectively. Crystalline content and residual stress were evaluated using X-ray diffraction (XRD). Microstructure was characterized by scanning electron microscopy (SEM). Optical properties were determined by reflectance test. Mechanical properties were assessed by biaxial flexural strength test. All analyses were performed before and after aging (134 C, 20 h, 2 bar). XRD and SEM revealed a typical ATZ and 3Y-TZP crystalline content, chiefly tetragonal phase, with a dense polycrystalline matrix, though a smaller grain size for ATZ. Aging triggered a similar monoclinic transformation for both systems; however, ATZ exhibited higher residual compressive stresses than 3Y-TZP. While as-processed 3Y-TZP demonstrated significantly higher characteristic strength relative to ATZ, no significant difference was observed after aging ($215 MPa increase in the ATZ strength). ATZ presented significantly higher opacity relative to 3Y-TZP, although aging significantly increased the translucency of both systems (increase difference significantly higher in the 3Y-TZP compared to ATZ). ATZ physicomechanical properties support its applicability in the dental field, with a lower detrimental effect of aging relative to 3Y-TZP.

show abstract

Residual Stress Evaluation by X-Ray Diffraction and Hole-Drilling in an API 5L X70 Steel Pipe Bent by Hot Induction

Cited by 11 publications

References 9 publications

The effect of cold working and solution heat treatment on microstructure and mechanical behavior of Ti35Nb2.5Sn alloy

The effect of cold working and solution heat treatment on microstructure and mechanical behavior of Ti35Nb2.5Sn alloy

Shot peening increases resistance to cyclic fatigue fracture of endodontic files

Alumina‐toughened zirconia for dental applications: Physicochemical, mechanical, optical, and residual stress characterization after artificial aging

Contact Info

Product

Resources

About