Erosion characteristics of heat-treated copper under pulsating subsonic water jet impingement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F26%3A00644184" target="_blank" >RIV/68081723:_____/26:00644184 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68145535:_____/26:00644184

Výsledek na webu

<a href="https://doi.org/10.1016/j.rineng.2025.108521" target="_blank" >https://doi.org/10.1016/j.rineng.2025.108521</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.rineng.2025.108521" target="_blank" >10.1016/j.rineng.2025.108521</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Erosion characteristics of heat-treated copper under pulsating subsonic water jet impingement

Popis výsledku v původním jazyce

This study examines the evolution of water droplet erosion on copper, which was subjected to various heat treatments (600 °C/hour and 900 °C/hour), with the as-received state serving as a control group. An ultrasonic pulsating water jet (PWJ) was employed as the droplet generator, operating at subsonic speeds with pressures of p = 20 MPa and p = 30 MPa at a frequency of f = 40 kHz. This fluid-centric impingement generated water pulses with droplet volumes of V20​ ≅ 1.27 mm3 and V30 ​≅ 1.6 mm3. Generated high-velocity water pulses, characterized by Weber numbers (approximately We = 596,374 for 20 MPa and We = 963,990 for 30 MPa), indicate that inertial forces dominated surface tension, leading to intense erosion dynamics. The concentrated action involved time exposures from t = 0.25 s to t = 2.5 s with a constant increment of t = 0.25 s. The primary erosion mechanism was driven by high impact pressure (water hammer effect), with lateral jetting contributing to crater widening. Erosion depth evolved logarithmically with exposure time, reaching saturation depths near 100 µm across all material states and pressure levels. Despite substantial differences in grain size and hardness (97 HV0.5 in the as-received state to ∼36 HV0.5 in both heat-treated states), no significant differences in erosion depth or volume were observed. The observed effect of the heat treatment process on erosion behavior is an increased volume of upheaved material, linked to renewed plasticity of the material. The results confirm that the high impact pressures generated by PWJ overwhelmed the influence of grain size and hardness, with material removal dominated by hydrodynamic forces rather than microstructural features.

Název v anglickém jazyce

Erosion characteristics of heat-treated copper under pulsating subsonic water jet impingement

Popis výsledku anglicky

This study examines the evolution of water droplet erosion on copper, which was subjected to various heat treatments (600 °C/hour and 900 °C/hour), with the as-received state serving as a control group. An ultrasonic pulsating water jet (PWJ) was employed as the droplet generator, operating at subsonic speeds with pressures of p = 20 MPa and p = 30 MPa at a frequency of f = 40 kHz. This fluid-centric impingement generated water pulses with droplet volumes of V20​ ≅ 1.27 mm3 and V30 ​≅ 1.6 mm3. Generated high-velocity water pulses, characterized by Weber numbers (approximately We = 596,374 for 20 MPa and We = 963,990 for 30 MPa), indicate that inertial forces dominated surface tension, leading to intense erosion dynamics. The concentrated action involved time exposures from t = 0.25 s to t = 2.5 s with a constant increment of t = 0.25 s. The primary erosion mechanism was driven by high impact pressure (water hammer effect), with lateral jetting contributing to crater widening. Erosion depth evolved logarithmically with exposure time, reaching saturation depths near 100 µm across all material states and pressure levels. Despite substantial differences in grain size and hardness (97 HV0.5 in the as-received state to ∼36 HV0.5 in both heat-treated states), no significant differences in erosion depth or volume were observed. The observed effect of the heat treatment process on erosion behavior is an increased volume of upheaved material, linked to renewed plasticity of the material. The results confirm that the high impact pressures generated by PWJ overwhelmed the influence of grain size and hardness, with material removal dominated by hydrodynamic forces rather than microstructural features.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2026

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Results in Engineering

ISSN

2590-1230

e-ISSN

2590-1230

Svazek periodika

29

Číslo periodika v rámci svazku

March 2026

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

108521

Kód UT WoS článku

001641037200001

EID výsledku v databázi Scopus

2-s2.0-105024340960