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2019
1 Ingdal, Mats; Johnsen, Roy; Harrington, David A..
The Akaike information criterion in weighted regression of immittance data. Electrochimica Acta 2019 ;Volum 317. s. 648-653
NTNU Untitled
 
2 Johnsen, Roy; Gjelseng, Linn Cecilie; Heimsæter, Martin Arne; Jernberg, Anders; Qvale, Atle H.
Influence of Manufacturing Process and Resulting Microstructure on HISC Susceptibility of 25Cr Duplex Stainless Steel Pipe. International Corrosion Conference Series 2019 s. -
NTNU Untitled
 
3 Johnsen, Roy; Olavesen, Henrik Horten; Hossein Zavieh, Amin; Erlien, Tomas Laugsand.
Effect of cathodic polarization on localized corrosion of 25Cr in seawater. International Corrosion Conference Series 2019 ;Volum 2019-March. s. -
NTNU Untitled
 
4 Kheradmand, Nousha; Rogne, Bjørn Rune Sørås; Dumoulin, Stephane; Deng, Yun; Johnsen, Roy; Barnoush, Afrooz.
Small scale testing approach to reveal specific features of slip behavior in BCC metals. Acta Materialia 2019 ;Volum 174. s. 142-152
NTNU SINTEF Untitled
 
5 Stefansson, Njall; Dunn, John; Strand, Einar; Johnsen, Roy; Heimsæter, Martin Arne.
Performance of high strength UNS N08830 in hydrogen stress crack testing to simulate conditions arising from subsea cathodic protection. International Corrosion Conference Series 2019 ;Volum 2019-March. s. -
NTNU Untitled
 
6 Torres Rodriguez, Cristian; Johnsen, Roy; Østvold, Hege Kokslien; Bernås, Mia; Iannuzzi, Mariano.
Effect ofW on Phase Transformation Kinetics and its Correlation with Localized Corrosion Resistance for UNS S39274. International Corrosion Conference Series 2019 ;Volum 2019-March. s. -
NTNU Untitled
 
7 Wilson, Håvard; Johnsen, Roy; Torres Rodriguez, Cristian; Hesjevik, Sven Morten.
Properties of TSA in natural seawater at ambient and elevated temperature. Materials and corrosion - Werkstoffe und Korrosion 2019 ;Volum 70.(2) s. 293-306
NTNU Untitled
 
2018
8 Bernås, Mia; Westermann, Ida; Johnsen, Roy; Torres Rodriguez, Cristian; Jernberg, Anders; Qvale, Atle H; Iannuzzi, Manuela.
Effect of tungsten on the precipitation kinetics and localized corrosion resistance of super duplex stainless steels. International Corrosion Conference Series 2018 ;Volum 2018-April. s. 1-15
NTNU Untitled
 
9 Hajilou, Tarlan; Hope, Malin Sofie B.; Hossein Zavieh, Amin; Kheradmand, Nousha; Johnsen, Roy; Barnoush, Afrooz.
In situ small-scale hydrogen embrittlement testing made easy: An electrolyte for preserving surface integrity at nano-scale during hydrogen charging. International journal of hydrogen energy 2018 ;Volum 43.(27) s. 12516-12529
NTNU Untitled
 
10 Husby, Hans; Iannuzzi, Mariano; Johnsen, Roy; Mariano, Kappes; Barnoush, Afrooz.
Effect of nickel on hydrogen permeation in ferritic/ pearlitic low alloy steels. International journal of hydrogen energy 2018 ;Volum 43.(7) s. 3845-3861
NTNU Untitled
 
11 Husby, Hans; Wagstaff, Philip Haakon; Iannuzzi, Mariano; Johnsen, Roy; Kappes, Mariano A.
Effect of Nickel on the Hydrogen Stress Cracking Resistance of Ferritic/Pearlitic Low Alloy Steels. Corrosion 2018 ;Volum 74.(7) s. 801-818
NTNU Untitled
 
12 Johnsen, Roy; Lange, Torstein; Stenerud, Gaute; Olsen, Jim Stian.
Environmentally assisted degradation of spinodal copper alloy C72900. Corrosion Science 2018 ;Volum 142. s. 45-55
NTNU SINTEF Untitled
 
13 Krogstad, Hedda Nordby; Johnsen, Roy; Coey, Michael.
Effect of a time-dependent magnetic field on the corrosion of Ni-Al bronze. Corrosion 2018 ;Volum 74.(3) s. 337-349
NTNU Untitled
 
14 Krogstad, Hedda Nordby; Johnsen, Roy; Coey, Michael.
Effect of a uniform magnetic field on corrosion of Ni-Al bronze in 3.5wt% NaCl. Corrosion 2018 ;Volum 74.(2) s. 197-209
NTNU Untitled
 
15 Ryen, Audun; Johnsen, Roy; Iannuzzi, Mariano; Årtun, Lars.
Cathodic protection by distributed sacrificial anodes - Performance at elevated temperature and in mud. International Corrosion Conference Series 2018 ;Volum 2018-April. s. 1-15
NTNU Untitled
 
16 Stenerud, Gaute; Johnsen, Roy; Olsen, Jim Stian.
Hydrogen stress cracking and crack initiation in precipitation hardened Ni-alloys. Engineering Failure Analysis 2018 ;Volum 89. s. 74-87
NTNU Untitled
 
17 Stenerud, Gaute; Wenner, Sigurd; Olsen, Jim Stian; Johnsen, Roy.
Effect of different microstructural features on the hydrogen embrittlement susceptibility of alloy 718. International journal of hydrogen energy 2018 ;Volum 43.(13) s. 6765-6776
NTNU Untitled
 
18 Torres Rodriguez, Cristian; Kappes, Mariano A; Johnsen, Roy; Iannuzzi, Mariano.
Influence of tungsten on passivity breakdown and repassivation of 25CR super duplex stainless steel. International Corrosion Conference Series 2018 ;Volum 2018-April.
NTNU Untitled
 
19 Wold, Kristian; Johnsen, Roy; Iannuzzi, Mariano; Årtun, Lars.
Integrated cathodic protection (CP) sensor network development of the CP sensor. International Corrosion Conference Series 2018 ;Volum 2018-April. s. 1-13
NTNU Untitled
 
2017
20 Bernås, Mia; Westermann, Ida; Johnsen, Roy; Lauritsen, Christian; Iannuzzi, Mariano.
Effect of microstructure on the corrosion resistance of duplex stainless steels: Materials performance maps. International Corrosion Conference Series 2017 ;Volum 8. s. 5476-5490
NTNU Untitled
 
21 Farhat, Hanan; Johnsen, Roy.
Hydrogen sulfide tube failure in a seawater heat exchanger. Materials performance 2017 ;Volum 56.(9) s. 42-45
NTNU Untitled
 
22 Haugan, Eirik; Næss, Monika; Torres Rodriguez, Cristian; Johnsen, Roy; Iannuzzi, Mariano.
Effect of tungsten on the pitting and crevice corrosion resistance of Type 25Cr super duplex stainless steels. Corrosion 2017 ;Volum 73.(1) s. 53-67
NTNU Untitled
 
23 Iannuzzi, Mariano; Barnoush, Afrooz; Johnsen, Roy.
Materials and corrosion trends in offshore and subsea oil and gas production. npj Materials degradation 2017
NTNU Untitled
 
24 Johnsen, Roy.
Hydrogen Induced Stress Cracking of Stainless Steel in Seawater – what do we know and what is still unknown?. EUROCORR 2017; 2017-07-03 - 2017-07-07
NTNU Untitled
 
25 Johnsen, Roy; Nese, Ove.
AA5083 and AA6082 exposed to seawater - Effect of potential on corrosion behaviour. International Corrosion Conference Series 2017 ;Volum 3. s. 1883-1897
NTNU Untitled
 
26 Krogstad, Hedda Nordby; Johnsen, Roy.
Corrosion properties of nickel-aluminium bronze in natural seawater?Effect of galvanic coupling to UNS S31603. Corrosion Science 2017 ;Volum 121. s. 43-56
NTNU Untitled
 
27 Krogstad, Hedda Nordby; Johnsen, Roy; Coey, M.
Corrosion of nickel aluminium bronze - Effect of a uniform magnetic field. International Corrosion Conference Series 2017 ;Volum 3. s. 1968-1981
NTNU Untitled
 
28 Krogstad, Hedda Nordby; Skilbred, Ellen Synnøve; Johnsen, Roy.
Corrosion of nickel aluminium bronze - Effect of alloying elements and pH. International Corrosion Conference Series 2017 ;Volum 3. s. 1958-1967
NTNU Untitled
 
29 Quale, Geir; Iannuzzi, Mariano; Johnsen, Roy.
Cathodic protection by distributed sacrificial anodes - A new cost-effective solution to prevent corrosion of subsea structures. International Corrosion Conference Series 2017 ;Volum 2. s. 949-963
NTNU Untitled
 
30 Stenerud, Gaute; Johnsen, Roy; Olsen, Jim Stian; He, Jianying; Barnoush, Afrooz.
Effect of hydrogen on dislocation nucleation in alloy 718. International journal of hydrogen energy 2017 ;Volum 42.(24) s. 15933-15942
NTNU Untitled
 
2016
31 Bengtsson Blucher, Daniel; Lange, Torstein; Venkataraman, Shankar; Asteman, Henrik; Jakobi, Dietlinde; Johnsen, Roy.
A new centrifugally cast austenitic Ni-base alloy suitable for severe sour service heavy wall thickness piping application. EUROCORR 2016; 2016-09-11 - 2016-09-15
NTNU SINTEF Untitled
 
32 Bernås, Mia; Westermann, Ida; Johnsen, Roy; Iannuzzi, Mariano.
Microstructural evolution during isothermal heat treatment of a W-rich super duplex stainless steel. Nasjonal Konferanse for Materialteknologi; 2016-08-24 - 2016-08-25
NTNU Untitled
 
33 Johnsen, Roy.
Hydrogen Induced Stress Cracking of Duplex Stainless Steel under Cathodic Protection in Seawater – Historical overview and Lessons Learned. Material Science & TEchnology 2016; 2016-10-23 - 2016-10-27
NTNU Untitled
 
34 Johnsen, Roy; husby, hans; Barnoush, Afrooz; Iannuzzi, Mariano.
Effect of nickel in solid solution on hydrogen transport kinetics in low alloy steels. EUROCORR/16; 2016-09-11 - 2016-09-15
NTNU Untitled
 
35 Johnsen, Roy; Iannuzzi, Mariano.
Distributed Sacrificial Anode (DSA) – a new cost effective solution for corrosion protection of structures in seawater. Materialdagen; 2016-06-02 - 2016-06-03
NTNU Untitled
 
36 Johnsen, Roy; Iannuzzi, Mariano; Haugan, Eirik; Næss, Monika E.
Effect of Tungsten on Pitting and Crevice Corrosion of type 25Cr Super Duplex Stainless Steel. NACE International Corrosion 2016 Conference & Expo; 2016-03-06 - 2016-03-10
NTNU Untitled
 
37 Johnsen, Roy; Lange, Torstein; Olsen, Jim Stian.
Susceptibility to hydrogen embrittlement for C72900 exposed to H2S environment and under cathodic polarization in simulated seawater. EUROCORR 2016; 2016-09-11 - 2016-09-15
NTNU SINTEF Untitled
 
38 Johnsen, Roy; Stenerud, Gaute; Barnoush, Afrooz; Olsen, Jim Stian.
In Situ Electrochemical Nanoindentation of Alloy 718. EUROCORR 2016; 2016-09-11 - 2016-09-15
NTNU Untitled
 
39 Kheradmand, Nousha; Johnsen, Roy; Olsen, Jim Stian; Barnoush, Afrooz.
Effect of Hydrogen on the hardness of different phases in super duplex stainless steel. International journal of hydrogen energy 2016 ;Volum 41.(1) s. 704-712
NTNU Untitled
 
40 Krogstad, Hedda Nordby; Johnsen, Roy.
The effect of a Magnetic Field on the Galvanic corrosion of NiAlBronze in Natural Seawater.. NACE International Corrosion 2016 Conference & Expo; 2016-03-06 - 2016-06-10
NTNU Untitled
 
41 Lange, Torstein; Bengtsson Blucher, Daniel; Venkataraman, Shankar; Jakobi, Dietinde; Asteman, Henrik; Johnsen, Roy.
A new cast Ni-base alloy suitable for severe sour service. International Corrosion Conference Series 2016 ;Volum 4. s. 2508-2520
NTNU SINTEF Untitled
 
42 Næss, Monika; Johnsen, Roy; Haugan, Eirik Bjørge; Iannuzzi, Mariano.
Effect of tungsten on pitting and crevice corrosion of type 25Cr super duplex stainless steel. International Corrosion Conference Series 2016 ;Volum 2. s. 1474-1488
NTNU Untitled
 
43 Olden, Vigdis; Johnsen, Roy; Zhang, Zhiliang.
Hydrogen induced stress cracking (HISC). SINTEF and NTNU's Environmental Assisted Cracking workshop - SNEAC; 2016-06-08 - 2016-06-10
NTNU SINTEF Untitled
 
44 Venkataraman, Shankar; Bengtsson Blucher, Daniel; Jakobi, Dietinde; Asteman, Dr. Henrik; Johnsen, Roy; Lange, Torstein.
A New Cast Ni-Base Alloy Suitable for Severe Sour Service. NACE International Corrosion 2016 Conference & Expo; 2016-03-06 - 2016-03-10
NTNU SINTEF Untitled
 
2015
45 Castberg, Tore Støren; Johnsen, Roy; Berget, J.
Corrosion and subsequent erosion of hardmetals: Dependence of WC grain size and distribution, and binder composition. Materials and corrosion - Werkstoffe und Korrosion 2015 ;Volum 66.(9) s. 899-906
NTNU Untitled
 
46 Holager, Cathrine Selina; Johnsen, Roy; Nisancioglu, Kemal.
Corrosion of Thermally Sprayed Aluminum in Flowing Seawater. NACE Corrosion 2015; 2015-03-15 - 2015-03-19
NTNU Untitled
 
47 Holager, Cathrine Selina; Johnsen, Roy; Nisancioglu, Kemal.
Corrosion of thermally sprayed aluminum in flowing seawater. International Corrosion Conference Series 2015 s. -
NTNU Untitled
 
48 Iannuzzi, Mariano; Johnsen, Roy; Næss, Monika E.
Use of electrochemical techniques to determine localized corrosion resistance of 25-wt% Cr Super Duplex Stainless Steels. 16th Nordic Corrosion Congress; 2015-05-20 - 2015-05-22
NTNU Untitled
 
49 Iannuzzi, Mariano; Johnsen, Roy; Næss, Monika E.
Use of electrochemical techniques to determine the degree of σ-phase precipitation in Type 25Cr SDSS. CORROSION/15; 2015-03-16 - 2015-03-19
NTNU Untitled
 
50 Johnsen, Roy.
Corrosion and hydrogen embrittlement in production systems – effect on process safety.. Qatar Process Safety Symposium “Successfully Managing Changes for a safer future; 2015-03-30 - 2015-03-31
NTNU Untitled
 
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