## 1 Introduction  
Stress corrosion cracking (SCC) originating from a welding joint is the predominant factor of the steel pipeline failure in a harsh environment. The SCC in many occasions causes the collapse of high-pressure gas transmission pipes that leads to significant economic loss, as well as environmental and health risks [1; 2]. [PERSON] et al. evaluated the welded joints of X65 steel exposed in the shallow deep sea [3]. It is found that the high hydrostatic pressure, low hydrogen, and temperature trigger localized corrosion induced SCC [4; 5]. Various efforts have been conducted to understand and mitigate the SCC in stainless steels and their welding joints; however, these studies mostly focus on the welding joints of similar metals while the real challenge in dissimilar metal welds is still overlooked [6; 7; 8]. Dissimilar welding promotes a strenuous task due to the melting point difference [9]. From the SCC's point of view, the resulted dissimilar metal joint is more susceptible to the SCC. Recently, it has been suggested that post-welding heat treatment could improve the resilience of dissimilar metal welding joints to the SCC load [10]. There are several methods that have been developed to carry out dissimilar welding joints. To \"joint\" plates, the explosive welding (EXW) may be the most effective process to clad certain metals onto the surface of another metal. A literature study of EXW application and research is provided by [PERSON] [11]. TA1 (Titanium Alloy grade 1) with high corrosion resistance has been clad successfully to X65 high strength steel [12], while other welding methods produce brittle intermetallic Fe-Ti compounds which usually initiates failure. Ti6 Al4V was clad on Inconel 25 [13]. When 600 \({}^{\circ}\)C annealing was applied, the ductility was increased, but no other mechanical properties were improved. A5086 aluminum alloy was clad on American Society for Testing and Materials (ASTM) A516 low carbon steel with pure aluminum as intermediate layer using EXW [14]. Inspection using digital image showed that the higher strain takes place at the aluminum side. Infrared thermography was used to predict the fatigue life of the Bimetal and the result from the experiment verified the prediction. A non-linear finite element analysis was able to emulate the EXW well [15], which may be used as intellectual control of the EXW process in the future. Recently, solid state welding has been proposed to join dissimilar metal or metals with low weld ability in terms of \"conventional\" fusion welding. A review study on the application of solid state welding to join dissimilar metals has been published [16]. The effect of parameters on the resulted strength of the joint has also been studied, such as the effect of pressure force [17] and the length of the pin [18]. Capacitive discharge welding (CDW), which may be also called Capacitor Discharge Welding, is a form of resistance welding where the energy is drawn from a stored energy in a capacitor instead of directly from the grid. Unlike EXW, which is typically applied on quite large-sized plates, CDW can be applied on small-sized metal bars. Using the stored energy, the time of the welding process is short and concentrated (one tenth of typical resistance welding [19]). Using a high speed camera [20], it can be concluded that the CDW process is one-dimensional due to fast arc spread upon ignition [21]. A wide application of the CDW on the automotive area in North America is accelerated due to the need of dissimilar welding to provide lightweight cars. In a lightweight car, exhibiting welding of hot-stamped boron steels and aluminum-silicon coated steels is needed, which on many occasions is unevenly clad. CDW has also been used to join pipes and/or tubular parts [22]. To obtain good joints of the tubular parts, grooving or indentation (surface preparation) is needed. Based on the above literature study, this research evaluates the SCC behavior of a dissimilar joint which is produced by the CDW process.