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a,b show the scanning electron microscopy of nickel-rich boride combined with an EDS spectrum, and Table 5 lists the chemical composition of this boride. In addition to nickel, another element that is rejected into the residual melt by the developing dendrites is chromium, which is strongly reactive with boron. The residual melt rose significantly in the earlier stages as a result of the limited solubility of chromium in nickel and nickel boride (10.11 and 18 at.%, respectively [40]). At this point, the conditions are favorable for the creation of an intermetallic compound of chromium and boron. Chromium-rich boride is visible in the bonded sample under bonding conditions of 1050 °C/15 min in c,d, which is an image taken with a scanning electron microscope. It is obvious that non-equilibrium solidification caused these particles with random shapes to become solidified [41]. These particles' EDS analysis reveals that the boride is mainly composed of chromium, with few additional alloying elements.
Source publication
The dissimilar joining of martensitic and ferritic stainless steels have been developed that needs corrosion resistance and enhanced mechanical properties. In this study, the transient liquid-phase bonding of martensitic stainless steel 410 and super-ferritic stainless steel 446 was conducted with a nickel-based amorphous interlayer (BNi-2) at cons...
Citations
... However, in conventional welding methods, the possibility to join metallic dissimilar materials, irrespective of the different thermal expansion coefficients, melting temperatures and mechanical properties, is restricted [16][17][18]. In contrast, explosive welding can effectively integrate the physical, chemical and mechanical advantages of dissimilar metals [19][20][21], which also can be able to prepare large area size composite with a wavy interface [22,23]. ...
... Under these conditions, it is possible to join metallic materials of the same type, but also dissimilar metallic materials, directly or via intermediate layers [2,8,[11][12][13]. Basically, this process can be used to weld almost all "other materials and a large number of material combinations [...]" [1], i.e., also ceramics, glasses and/or components produced by powder metallurgy. ...
... Under these conditions, it is possible to join metallic materials of the same typ also dissimilar metallic materials, directly or via intermediate layers [2,8,[11][12][13]. Basi this process can be used to weld almost all "other materials and a large number of m combinations [...]" [1], i.e., also ceramics, glasses and/or components produced by po metallurgy. ...
Diffusion welding is a solid-state welding process and is characterised by the process parameters temperature, compression force and process time. Usually, the process force is applied as static load, and high demands with respect to specimen surfaces (low roughness, cleanliness) are common. The aim of this work was to improve the necessary technology for diffusion welding and, above all, to increase the quality of the joints by using cyclically pulsative joining forces to minimise the time or surface-specific conditions, which are typical for this process. For this purpose, a corresponding system technology had to be designed and manufactured. The basis of the system was a modified machine concept for materials testing. As a result, the modified system and the modified process were able to reduce the process time by a factor of 5 to 6 compared to the conventional joining time.
