The phrase "a surface initiation" is correct and usable in written English.
It can be used in contexts related to processes or phenomena that begin at a surface level, such as in materials science or engineering.
Example: "The experiment focused on a surface initiation of the reaction, which was crucial for understanding the overall process."
Alternatives: "a surface start" or "a surface onset".
The penetration of the carbon steel pipe and equipment wall by pits is a process that consists of three stages: formation of surface layer on the steel surface, initiation of pits at localized regions on the steel surface where surface layers break down, and pit propagation and eventual penetration of the wall.
In addition, the possible fluorination of various surfaces through surface initiation is highlighted.
The specimens were shot peened to represent the component condition and to suppress free surface initiation.
Surface initiation (SNFCO and SDFCO) was related to the high-gradient microstructure in the joint, while IDFCO mainly depended on the size and shape of defects.
It shows that for specimens tested in 3.5% NaCl solution, cracks originate via multiple surface initiation modes and cracking is intergranular; in addition, widespread secondary cracks feature on the fracture surface.
Between 106 and 108 cycles a transition point is located, where both internal and surface initiations of cracks occurred.
A thorough review of the literature on fatigue crack initiation indicates that for optimum resistance to fatigue crack initiation, a surface coating needs more than just a high hardness and that a combination of properties including toughness, cyclic work hardenability, residual compressive stresses, and adherence, in addition to a hardness higher than that of the substrate are required.
The cell based model includes three overlapping phases that describe events that take place on different cell surfaces: initiation, amplification, and propagation.
Butane isomerization over sulfated-zirconia can be viewed as being a surface chain reaction comprising initiation, propagation, and termination steps.
For this purpose, a surface roughness criterion for detecting crack initiation at different applied loads is introduced.
