A Castanhola Batista

A Castanhola Batista

Universidade de Coimbra

H-index: 14

Europe-Portugal

Professor Information

University

Universidade de Coimbra

Position

Portugal

Citations(all)

929

Citations(since 2016)

489

Cited By

613

hIndex(all)

14

hIndex(since 2016)

10

i10Index(all)

16

i10Index(since 2016)

13

Email

University Profile Page

Universidade de Coimbra

Research & Interests List

Residual Stress Analysis

Co-Authors

H-index: 59
Wim VAN PAEPEGEM

Wim VAN PAEPEGEM

Universiteit Gent

H-index: 53
Steve Bull

Steve Bull

Newcastle University

H-index: 45
Altino Loureiro

Altino Loureiro

Universidade de Coimbra

H-index: 41
Nicholas Wright

Nicholas Wright

Newcastle University

H-index: 36
Anthony O'Neill

Anthony O'Neill

Newcastle University

H-index: 31
Vladimir Khomchenko

Vladimir Khomchenko

Universidade de Coimbra

H-index: 19
Joana Rebelo Kornmeier

Joana Rebelo Kornmeier

Technische Universität München

H-index: 14
Zhengwen Pu

Zhengwen Pu

University of Kentucky

H-index: 6
Maria José Marques

Maria José Marques

Universidade do Porto

Professor FAQs

What is A Castanhola Batista's h-index at Universidade de Coimbra?

The h-index of A Castanhola Batista has been 10 since 2016 and 14 in total.

What are A Castanhola Batista's research interests?

The research interests of A Castanhola Batista are: Residual Stress Analysis

What is A Castanhola Batista's total number of citations?

A Castanhola Batista has 929 citations in total.

What are the co-authors of A Castanhola Batista?

The co-authors of A Castanhola Batista are Wim VAN PAEPEGEM, Steve Bull, Altino Loureiro, Nicholas Wright, Anthony O'Neill, Vladimir Khomchenko, Joana Rebelo Kornmeier, Zhengwen Pu, Maria José Marques.

Top articles of A Castanhola Batista

Influence of post-processing milling conditions on the machinability and residual stresses evolution of LPBF 18Ni300 maraging steel

Metal additive manufacturing (MAM) currently allows the production of mechanical components with technical specifications suitable for structural applications with a high level of complexity. Despite the most recent technological developments, additively manufactured parts may still lack the geometrical and dimensional accuracy as well as surface integrity required for precision mechanical assemblies and system reliability. These requirements often lead to post-processing operations through precision machining technologies. The present work focuses on the machinability study of 18Ni300 maraging steel obtained by laser powder bed fusion and its comparison with the conventional counterpart. Milling tests were carried out covering a wide range of cutting parameters, aiming at understanding their influence and comparing the obtained results in terms of cutting force, specific cutting pressure, roughness and chip …

Authors

Miguel Duro,Tiago Silva,Maria José Marques,António Batista,Pedro Rosa,Abílio de Jesus

Journal

The International Journal of Advanced Manufacturing Technology

Publish By

Springer London

Publish Date

2023/7

Experiments for the Quantification of the Initial Stress State in UIC Parabolic Leaf Springs

Parabolic leaf springs applied in freight wagons are standardized by the International Union of Railways, UIC. According to the UIC, parabolic leaf springs must be stress peened after quenching and tempering in order to produce a compressive stress state on the surface to improve the fatigue strength. After heat and mechanical treatments, spring leaves are assembled. Due to distinct curvature radius of spring leaves, they are pre-stressed, introducing another type of initial stress state in the spring leaves. In order to quantify the initial stress state in UIC parabolic leaf springs, two types of experiments are performed. The stress relief method and the X-ray diffraction method are performed to analyze the assembling stresses and residual stresses by stress shot peening respectively. The superposition method is considered to estimate a corrected fatigue limit encompassing the material fatigue limit and the effect of the …

Authors

VMG Gomes,MJ Marques,M Figueiredo,JAFO Correia,AC Batista,R Calçada,AMP de Jesus

Journal

Procedia Structural Integrity

Publish By

Elsevier

Publish Date

2023/1/1

In-situ analysis of the thermoelastic effect and its relation to the onset of yielding of low carbon steel

The thermoelastic effect indicates the dependency of temperature and volume change in the material and, due to the heat released during plastic deformation, a temperature minimum occurs in the region of the onset of yielding. An experimental setup is presented for the microscopic analysis of the thermoelastic effect, which allows high precision measurements of specimen. In-situ diffraction experiments were performed for a single phase low carbon steel HC260Y using synchrotron diffraction at the High Energy Material Science beamline P07 in Petra III, DESY. This allows a direct comparison of the onset of yielding by observing the evolution of lattice strains and dislocations densities with the specimen temperature in a continuous cyclic test having high measuring frequency and accuracy. Therefore, the lattice strains are evaluated based on the peak shift of several lattice planes and the dislocation density is …

Authors

Simon Vitzthum,Joana Rebelo Kornmeier,Michael Hofmann,Maximilian Gruber,Emad Maawad,António C Batista,Christoph Hartmann,Wolfram Volk

Journal

Materials & Design

Publish By

Elsevier

Publish Date

2022/7/1

Fatigue crack growth in Ti-6Al-4V specimens produced by Laser Powder Bed Fusion and submitted to Hot Isostatic Pressing

The fatigue crack growth (FCGR) behaviour of titanium alloy Ti-6Al-4V submitted to Hot Isostatic Pressing through CT specimens manufactured by Laser Powder Bed Fusion (LPBF) is analysed. Both the crack growth under constant amplitude loading and the transient crack growth behaviour after the application of overloads or underloads were studied. The effect of the mean stress and the transient delay behaviour were studied using the crack closure parameter. The HIP treatment showed an increment in the FCGR strength increasing the fatigue threshold, the critical stress intensity factor and the FCGR resistance. Crack closure induced by plasticity for the stress ratio R = 0 was observed and for R = 0.4 no crack closure was detected. The applied overloads caused a FCGR retardation due to the increase of crack closure effect induced by plasticity resulting from the overloads while for underloads application no …

Authors

JS Jesus,LP Borrego,JAM Ferreira,JD Costa,AC Batista,C Capela

Journal

Theoretical and Applied Fracture Mechanics

Publish By

Elsevier

Publish Date

2022/4/1

Rolling and Rolling-Sliding Contact Fatigue Failure Mechanisms in 32 CrMoV 13 Nitrided Steel—An Experimental Study

The aim of this work is to characterize the rolling and rolling-sliding contact fatigue failure mechanisms on the 32CrMoV13 nitrided steel. During rolling contact fatigue tests (RCF), two general features were observed: specimens presenting short lives and rough and sharpened spalling damage and specimens presenting long lives and only microspalling marks. It was possible to determine a contact fatigue limit of 3 GPa. During rolling-sliding contact fatigue tests (RSCF), a clearly different behaviour between the two specimens in contact has been observed: the driver shows circumferential and inclined cracks and only inclined cracks appear in the follower. This behaviour can be understood if the effect of the residual stress state in near-surface layers is considered. Before RCF tests, the residual stresses are compressive in all near-surface layers. After RCF tests, strong residual stress relaxation and even reversing behaviour was observed in the axial direction, which facilitates the surface crack initiation in the circumferential direction at rolling track borders.

Authors

Luís Coelho,António C Batista,João Paulo Nobre,Maria José Marques

Journal

Applied Sciences

Publish By

MDPI

Publish Date

2021/11/8

Fatigue Performance of Thin Laser Butt Welds in HSLA Steel

This work is focused on understanding the significant factors affecting the fatigue strength of laser-welded butt joints in thin high-strength low-alloy (HSLA) steel. The effects of the weld profile, imperfections, hardness, and residual stresses were considered to explain the results found in the S-N curves of four welded series. The results showed acceptable fatigue strength although the welded series presented multiple-imperfections. The analysis of fatigue behavior at low stress levels through the stress-concentrating effect explained the influence of each factor on the S-N curves of the welded series. The fatigue limits of the welded series predicted through the stress-concentrating effect and by the relationship proposed by Murakami showed good agreement with the experimental results.

Authors

Patricio G Riofrío,Fernando Antunes,José Ferreira,António Castanhola Batista,Carlos Capela

Journal

Metals

Publish By

MDPI

Publish Date

2021/9/22

57Fe Mössbauer Analysis of Meteorites and Tektites

This review presents studies on iron meteorites (Campo del Cielo fall and an unregistered iron meteorite), an unregistered stony meteorite from Northwest Africa, and 13 tektites from the American, European, and Australasian strewn fields. The main experimental technique used in the studies was Mössbauer spectroscopy, both in transmission and backscattering geometries. For the latter, a MIMOS II spectrometer was used. Additionally, optical and scanning electron microscopies and X-ray diffraction were used. In the studied iron meteorites, kamacite is found as the main mineral. Campo del Cielo meteorite exhibits Widmanstätten patterns and schreibersite inclusions. The unregistered iron meteorite has Neumann lines and schreibersite inclusions. We have assigned Campo del Cielo as an octahedrite and the unregistered iron meteorite as a hexahedrite. The unregistered stony meteorite is composed mainly of iron-free silicates; at 4.2 K, the spectrum indicates maghemite and 1% troilite. The Cambodian tektite appeared individualized from other australasites, unlike the moldavite, which tends to cluster with them. Our analyses do not allow dismissing doubts on the provenance of tibetanites. The Fe3+/Fe2+ ratio was found to be higher for Muong Nong-type tektites than for splash-form tektites, as expected from their morphology and solidification from melt at lower temperature.

Authors

Benilde FO Costa,Eduardo Ivo Alves,Pedro AOC Silva,António C Batista

Publish By

MDPI

Publish Date

2021/6/12

Fe-57 Mossbauer Analysis of Meteorites and Tektites

This review presents studies on iron meteorites (Campo del Cielo fall and an unregistered iron meteorite), an unregistered stony meteorite from Northwest Africa, and 13 tektites from the American, European, and Australasian strewn fields. The main experimental technique used in the studies was Mossbauer spectroscopy, both in transmission and backscattering geometries. For the latter, a MIMOS II spectrometer was used. Additionally, optical and scanning electron microscopies and X-ray diffraction were used. In the studied iron meteorites, kamacite is found as the main mineral. Campo del Cielo meteorite exhibits Widmanstatten patterns and schreibersite inclusions. The unregistered iron meteorite has Neumann lines and schreibersite inclusions. We have assigned Campo del Cielo as an octahedrite and the unregistered iron meteorite as a hexahedrite. The unregistered stony meteorite is composed mainly of …

Authors

Benilde FO Costa,Eduardo Ivo Alves,Pedro AOC Silva,Antonio C Batista

Journal

MINERALS

Publish By

MDPI

Publish Date

2021/6/1

academic-engine

Useful Links