Roberto Doglione

Confirmed Associate Professor
Department of Applied Science and Technology (DISAT)

  • Member of Interdepartmental Center SISCON - Safety of Infrastructures and Constructions

Profile

Research interests

CRACK CLOSURE EFFECT ON FATIGUE CRACK PROPAGATION THRESHOLD
EFFECT OF STRESS TRIAXIALITY ON HYDROGEN EMBRITTLEMENT
FATIGUE FROM CASTING DEFECTS
HYDROGEN CATHODIC ABSORPTION
hydrogen embrittlement
MIXED MODE CRACK GROWTH IN RAIL STEELS
PORTEVIN LE CHATELIER EFFECT
SERRATED YIELDING
stress corrosion cracking

Research topics

  • Hydrogen embrittlement in high strength steels and valve steels, effect of charging procedures and of stress triaxiality
  • Fatigue crack propagation in rail steels, mixed mode and crack closure effect, influence on the threshold of crack growth
  • Fatigue properties of structural alloys, Locati method and new testing procedures
  • Portevin Le Chatelier effect in rolled high-strength aluminium alloys with strong crystallographic textures
  • Microstructure and mechanical properties of light alloys, innovative heat treatments and new chemical compositions
  • Corrosion damage of steel bars and tendons in reinforced concrete
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Skills

ERC sectors

PE8_8 - Materials engineering (metals, ceramics, polymers, composites, etc.)
PE8_7 - Mechanical and manufacturing engineering (shaping, mounting, joining, separation)

SDG

Goal 9: Industry, Innovation, and Infrastructure

Teaching

PhD Boards

  • SICUREZZA INDUSTRIALE ED ANALISI DEI RISCHI, 2003/2004 (20. ciclo)
    Politecnico di TORINO
  • SICUREZZA INDUSTRIALE ED ANALISI DEI RISCHI, 2002/2003 (19. ciclo)
    Politecnico di TORINO
MostraNascondi collegi passati

Courses of Study Boards

Teachings

Master of Science

MostraNascondi A.A. passati

Other activities and projects related to teaching

Teaching activities include, beginning in the AA 2021-2022, an increase in laboratory experimental activities, focusing on mechanical testing of materials. Tensile tests with universal servohydraulic machines are conducted, highlighting the specific effects of state variables, i.e., strain, strain rate, temperature on plastic flow curves. Special effects that are conventionally described in lecture in the classroom, but so far have never been shown experimentally, and in particular static and dynamic aging, Portevin Le Chatelier effect, are highlighted. Specific experiments, using Digital Image Correlation (DIC) hardware and software, are being developed to study deformation fields under stress, showing localized plasticity effects in uniform stress fields. Correlations between localized plastic instabilities and brittleness of materials are shown using experimental procedures

Research

Institute

Research groups/teams

Research projects

Projects funded by competitive calls

  • SINTESI E CARATTERIZZAZIONE DI MATERIALI POLIMERICI NANOCOMPOSITI LAMELLARI PER APPLICAZIONI ELETTRICHE, (2007-2009) - Responsabile Scientifico
    Nationally funded research - PRIN
  • RIDUZIONE DEI CONSUMI E AUMENTO DELLA SICUREZZA NEI TRASPORTI DI SUPERFICIE MEDIANTE TRATTAMENTI TERMICI NON CONVENZIONALI DI LEGHE LEGGERE, (2006-2009) - Responsabile Scientifico
    Regionally funded research
  • PRESSURE ROLLING - ADVANCED PROCESS FOR THE PRESSURE ROLLING OF MATERIALS IN THE FOUNDRY INDUSTRY, (2002-2004) - Responsabile Scientifico
    UE-funded research - VPQ - GROWTH (CRESCITA COMPETITIVA E SOSTENIBILE)

Other activities and projects related to research

The research activity is mainly experimental and is carried out by means of mechanical tests aimed at measuring stresses and strain fields in metal alloys, accompanied by microstructural studies by optical and and electronic metallography, supplemented by fractographic investigations by scanning electron microscopy. Currently, the research subjects are as follows:

1) study of innovative heat treatments on light die casting alloys, to increase their mechanical properties

2) study of fatigue strength of foundry alloys in the presence of manufacturing defects, with special attention to the comparison of behavior under rotating bending and under axial loads, where differences in fatigue life are expected

3) study and improvement of the Locati method for fatigue life estimation by the single-sample method, with special attention to threaded component

4) investigation of fatigue crack propagation velocity on rail steels, with special attention to the activation of mixed modes of propagation, detection of crack closure phenomena, and modeling of behavior in the propagation threshold zone

5) Investigation of the Portevin-Le Chatelier effect in rolled high-strength aluminum alloys characterized by high crystallographic textures

6) research on hydrogen embrittlement in high-strength steels and valve steels, with the development of rapid and inexpensive hydrogen adsorption methodologies under stress and different triaxial stress states by cathodic absorption techniques

Publications

Latest publications View all publications in Porto@Iris