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Dive into the research topics where Tiago Samuel Renck is active.

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Featured researches published by Tiago Samuel Renck.


Corrosion | 2014

Evaluation of the Notch Influence on the Stress Corrosion Cracking Susceptibility of the API 5L X70 Steel in Ethanol

J.O. Breitenbach; Tiago Samuel Renck; Carlos Eduardo Fortis Kwietniewski; Telmo Roberto Strohaecker; Gutemberg Souza Pimenta; Ilson Palmieri Baptista; M. Araujo

The increasing interest in renewable and cleaner fuels has stimulated ethanol production in the last decades. The most cost-effective solution to transport large volumes of it are pipelines. Howeve...


ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering | 2014

Hydrogen Induced Stress Cracking on Superduplex Stainless Steel Under Cathodic Protection

José Fonseca; Tiago Samuel Renck; Eliakin Abreu; Fabrício Pinheiro dos Santos; Bruno Diehl; Carlos Eduardo Fortis Kwietniewski

The optimized and secure operation of oil and gas floating production units depends essentially on the performance of their devices, components and structures. Rigid pipelines are key equipment used in the offshore industry commonly employed as flowlines and risers. Carbon steel such as API 5L X65 is the material of choice for those applications due to its low relative cost and availability. However, for the Brazilian pre-salt it seems unlikely that carbon steels can be applyed, since the oil is contaminated by high concentrations of CO2, which causes generalized corrosion. Therefore, operators in Brazil should consider an alternative solution, such as lined or clad pipes as well as corrosion resistant alloys (CRA). Duplex and super duplex stainless steels (SDSS) have emerged in the last decade or so, as an alternative material for harsh environments. Nevertheless, according to recent studies, SDSS when cathodically protected against corrosion are prone to hydrogen induced stress cracking (HISC). The aim of this investigation is to evaluate through fracture toughness measurements the susceptibility of welded SDSS samples to HISC for two different levels of cathodic protection. For fracture toughness evaluation the step loading test method was selected. This practice is believed to be more realistic because samples are exposed to hydrogen during the entire tests instead of simple hydrogen pre-charging before performing the test in air, as recommended by some procedures. Fracture toughness values are given in terms of both CTOD and J-integral for crack initiation and maximum stress for SENB specimens. The results given here indicates that SDSS are quite susceptible to HISC especially in the heat affect zone even for potentials as negative as −650 mVsce.Copyright


ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering | 2015

Evaluation of Stress Corrosion Cracking Susceptibility of the API 5L X70 Steel in Corn and Sugar Cane Ethanol Environments

Joseane O. Breitenbach; Tiago Samuel Renck; Pedro M. Moraes; Carlos Eduardo Fortis Kwietniewski; Telmo Roberto Strohaecker; Gutemberg Souza Pimenta; Ilson Palmieri Baptista

The interest in renewable and cleaner fuels has stimulated ethanol production in the last decades. Some of the drivers for that ever increasing production were the Brazilian Alcohol Program, Kyoto Protocol and the replacement in USA of the octane booster MBTE (methyl-tert-buthyl ether) for ethanol. The world’s largest producers of ethanol are The United States of America and Brazil, where the main sources are corn and sugar cane, respectively. Production flow via pipeline is the safest and most cost effective way to connect the producers, usually spread across the country, to the distribution terminals. However, in USA there are evidences that ethanol may have caused stress corrosion cracking (SCC) in pipelines and also in storage tanks. Controversially, in Brazil ethanol has been transported and stored since the 1970’s without any indication of SCC. The aim of this work is to evaluate the susceptibility of the steel API 5L X70 [1] to SCC in different ethanol (corn and sugar cane) using slow strain rate testing (SSRT). These tests were carried out on notched specimens according to NACE TM 0111 [2]. The SSRT results carried out in corn ethanol have shown a considerable reduction of plastic elongation and a mixed fracture micromechanism of quasi-cleavage and intergranular facets clearly indicating a susceptibility of the API 5L X70 steel to SCC. The SSRT also demonstrated that the carbon steel tested here is completely immune to SCC in sugar cane ethanol.© 2015 ASME


ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering | 2013

Validation Methodology of Crack Growth Measurement Using Potential Drop Method on SENB Specimens

Marcio Ribeiro Antunes; Tiago Samuel Renck; Carlos Eduardo Fortis Kwietniewski; Bruno Diehl; Eliakin Abreu; Thomas Clarke; José Fonseca; Telmo Roberto Strohaecker; Fabrício Pinheiro dos Santos; Carlos Joia

The Brazilian pre-salt oil and gas discoveries brought technical challenges as impressive as the reserves themselves. Besides the concerns with exploration, the oil contamination with CO2, H2S and chloride enriched seawater combined with critical cyclic loads due to the relative movement of the production vessel and high water depths imposes an environment chemically and mechanically aggressive. Suitable materials to work on such harsh conditions are few and one should consider the use of special materials, such as supermartensitic and superduplex stainless steels. Although the corrosion and mechanical properties of these materials are well established, still additional crack growth data in specific environments should be provide to the subsea equipment designer. Indeed, due to the combination of cyclic loading and corrosive ambient the corrosion fatigue phenomenon is a major concern. In order to evaluate the effect of oil contaminants on the corrosion fatigue resistance of candidate materials, one should provide methods for crack growth measurement other than the use of crack gauges since those can not be used in chemically aggressive solutions. The present work aims to validate the potential drop crack growth measurement method comparing the results obtained by this technique with those produced by crack gauges on SEN(B) (Single Edge Notch Bending) specimens in air. This validation effort is essential because the ASTM E647 standard only consider the use of C(T) (Compact Tension) specimens which actually does not represents the real cracks propagation path in crucial subsea equipment, such as risers, drill pipes et cetera, that is through the wall thickness. The results produced by the two tested methodologies have an excellent agreement which makes reliable the use of the potential drop method as an alternative to monitor and measure crack growth in corrosive media.Copyright


Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2016

The microstructure effect on the fracture toughness of ferritic Ni-alloyed steels

Adriano Scheid; Lorenzo Marzari Félix; Douglas Martinazzi; Tiago Samuel Renck; Carlos Eduardo Fortis Kwietniewski


Engineering Fracture Mechanics | 2017

Effect of K-rate and cathodic protection potential on fracture toughness of the super duplex stainless steel UNS S32750

Adriano Scheid; Marcelo Sartori; Tiago Samuel Renck; Fabrício Pinheiro dos Santos; Marcelo Favaro Borges; Carlos Eduardo Fortis Kwietniewski


Corrosion | 2017

The Microstructure Effect on the Fracture Toughness of Ferritic Ni-alloyed Steels

Carlos Eduardo Fortis Kwietniewski; Tiago Samuel Renck; Adriano Scheid; Mariana R. Tagliari


Archive | 2002

Análise da falha, em serviço, de um tubo reautofretado

Valdira Fernandes dos Santos; Carlos Otávio Damas Martins; Tiago Samuel Renck; Tonilson de Souza Rosendo; Afonso Reguly; Telmo Roberto Strohaecker


Archive | 2001

Análise de falha em eixo de prensa

Everton Pizzio; Tiago Samuel Renck; Simone Aparecida Seero Pecantet; Telmo Roberto Strohaecker


Archive | 2001

Análise de falha em virabrequim

Tiago Samuel Renck; Maykel Alves Barlavento; Sandro Griza; Telmo Roberto Strohaecker

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Telmo Roberto Strohaecker

Universidade Federal do Rio Grande do Sul

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Carlos Eduardo Fortis Kwietniewski

Universidade Federal do Rio Grande do Sul

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Adriano Scheid

Federal University of Paraná

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Eliakin Abreu

Universidade Federal do Rio Grande do Sul

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José Fonseca

Universidade Federal do Rio Grande do Sul

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Mariane Chludzinski

Universidade Federal do Rio Grande do Sul

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