...John Snitzer; Xiaoyuan Lou Additively manufactured (AM) 316L stainless steel (SS) manufactured by laser powder bed fusion (L-PBF) and wrought 316L SS were subjected to sensitization heat treatments at 700°C up to 100 h. Using two evaluation methods, double-loop electrochemical potentiokinetic...

...Pablo M. Altamirano; Mariano A. Kappes; Martín A. Rodríguez The double loop-electrochemical potentiokinetic reactivation (DL-EPR) method estimates the degree of sensitization in stainless steels with i_r/i_a, the ratio of peak current densities during reactivation (reverse...

..., and intergranular corrosion. ^‡ Corresponding author. E-mail: [email protected] . 31 May 2021 05 November 2021 05 November 2021 © 2022, AMPP 2022 additive manufacturing intergranular corrosion laser powder bed fusion localized corrosion sensitization...

... that grain boundary regions in the heat-treated material were up to 65 mV less noble to the matrix, whereas undissolved niobium carbide (NbC) precipitates were up to 55 mV more noble to the matrix. In situ time-lapse microscopy and postcorrosion observations confirmed that sensitized grain boundaries were...

...). Sensitization in 5xxx series aluminum alloys refers to the precipitation of β on α-aluminum grain boundaries, which can occur in high-Mg 5xxx alloys after sufficient exposure to temperatures as low as 40°C. Recent research has established that da/dN in sensitized 5xxx series aluminum alloys can be inversely...

..., stainless steels with higher nitrogen content are prone to intergranular corrosion (IGC) due to their tendency to get sensitized by enhanced precipitation of Cr₂N. Thermomechanical treatment (TMT) of 6.5% cold-work and heat-treatment (1,323 K for 30 min) is evaluated in this study to enhance IGC...

...Raul B. Rebak; Sheldon W. Dean, Jr. The sensitization of stainless steels may decrease their corrosion resistance in industrial applications. Traditional immersion tests exist to determine the degree of sensitization (DOS) of the stainless steels. However, electrochemical methods may be preferred...

...D.J. Schrock; J.S. (Warner) Locke The effects of fatigue loading frequency (f), sensitization, and crack length on corrosion fatigue crack growth rates (da/dN) were investigated for AA5456-H116 under full immersion in 3.5 wt% NaCl. Results from fracture mechanics-based experiments conducted...

...C.U. Chukwunonye; Nicholas J. Jones; Gabriela Petculescu Velocity and attenuation of shear and longitudinal sound waves were measured as a function of sensitization level in AA5083-H116 and AA5456-H116 aluminum alloys using two different techniques: resonant ultrasound spectroscopy (RUS) and pulse...

..., such as Alloy 690, may be a function of the alloy sensitization condition. Sensitization results from chromium carbide precipitation at or near grain boundaries when the alloy is exposed to temperatures from 500°C to 800°C, which causes local chromium depletion in the adjacent matrix. The objective of this work...

...M. Srinivas; R.P. George; C. Mallika; U. Kamachi Mudali The sensitization behavior of Type 316LN stainless steel (SS) with varying nitrogen content (0.07 wt% and 0.22 wt%) in 0% to 25% cold worked (CW) as well as in the as-received condition was evaluated. Time-temperature-sensitization diagrams...

...José Wilmar Calderón-Hernández; Duberney Hincapie-Ladino; Edson Benedito Martins Filho; Rodrigo Magnabosco; Neusa Alonso-Falleiros Pitting potential (Ep) and degree of sensitization (DOS) of a supermartensitic stainless steel (SMSS) were determined on specimens heat-treated at different tempering...

.... The 304LN stainless steels were evaluated in forged, hot rolled, and hot rolled + heat treated conditions (948 K: 1, 10, 25, 50, 100, 260 h; 1,223 K: 1 h; 1,323 K: 1 h; and 1,473 K: 1 h). The study revealed good corrosion resistance for 304LN1 and 304LN2 SS as per ASTM A262 Practice-C test in sensitized...

... 25 01 2017 25 01 2017 © 2017, NACE International 2017 FIGURE 2. Crack growth rates versus applied stress intensity measured in moist laboratory air for specimens of various composition, temper, and sensitization. *AA5083-H131 Moist Air from Crane. ¹⁶ This resolution...

..., and -SHTQ) sensitized at 100°C (373 K) to Nitric Acid Mass Loss Test (NAMLT) values of 24 mg/cm² and 40 mg/cm². The more Mg-rich AA5456 shows less susceptibility to IGSCC than AA5083 for a constant -H116 temper. In AA5083, the -H131 temper exhibits the greatest susceptibility to IGSCC...

... of sensitization, and are more resistant to intergranular attack. Similar to general high-angle boundaries in this material, the combination of chromium depletion and the grain boundary energy acts as the initiator of corrosion. After initiation, crevice corrosion enlarges the initial site of the attack...

...Emily E. Hoffman; Alex Lin; Yifeng Liao; Laurence D. Marks Cobalt chromium molybdenum alloys have been extensively used for biomedical implants, but are susceptible to grain boundary corrosion resulting from local chromium depletion, which is called sensitization. This work extended...

... and general corrosion resistance. A particular concern is sensitization in service. Aluminum is considered sensitized when a nearly continuous network of β phase forms along the grain boundaries. The β phase is anodic to the Al matrix, and, when exposed to sea water and sufficient loading, provides a clear...

...Mohsen Seifi; N.J. Henry Holroyd; John J. Lewandowski Environmentally enhanced fracture in smooth tensile and fatigue pre-cracked test specimens of AA5083-H131 have been evaluated as a function of sensitization time up to 7,000 h, temperature (80°C to 175°C), and test environment (dry...

... precipitates seawater sensitization TABLE 1 Chemical Composition of As-Fabricated AA5083-H131 and AA5083-H116 (wt%) According to ASTM G67, a minimum of two specimens from each sample should be NAMLT tested. To perform NAMLT in the present study, two identical specimens from each sample...