Introduction
1Cr17Ni7, commonly known as AISI301, is a type of austenitic stainless steel. It is a non-magnetic stainless steel, containing nickel as its major alloying element and provides good ductility and formability. 1Cr17Ni7 is mainly used in automotive components and plumbing fittings, such as flat springs, fasteners, rivets, kitchen utensils and door locks. Due to its good corrosion resistance and excellent formability, 1Cr17Ni7 has been widely used in many fields, including aircraft manufacturing and aerospace applications.
In recent years, the demand for stainless steel has increased, and the research on 1Cr17Ni7 has also become more extensive. Because it is a new material, it is necessary to study its properties from different angles, so as to further promote the application of 1Cr17Ni7. One of the most important properties of this material is its fracture toughness.
Literature Review
Fracture toughness is an important parameter to measure the performance of 1Cr17Ni7. It is mainly used to measure the strength of 1Cr17Ni7 when it is subject to dynamic loading. It is the ability of a material to resist the crack propagation after the initial crack occurs. A materials fracture toughness is the amount of energy it can absorb before fracture, which determines the strength of the material under dynamic loads.
Fracture toughness of 1Cr17Ni7 has been studied by a number of researchers. Maiti et al. analysed the fracture toughness of 1Cr17Ni7 using the conventional four-point bending test and found that the fracture toughness of 1Cr17Ni7 was similar to that of other austenitic stainless steels. Xu and Wang studied the fracture toughness of 1Cr17Ni7 under static loading and found that the static fracture toughness was lower than that of other austenitic stainless steels but higher than some ferritic and martensitic stainless steels. Hofmann et al. studied the fracture toughness of 1Cr17Ni7 under dynamic loading and found that 1Cr17Ni7 had excellent fracture toughness under dynamic loading.
Experimental method
The fracture toughness of 1Cr17Ni7 was tested by the four-point bend test. It is a static test in which two points serve to apply the loading force on the specimen and the other two serve as supports. The specimen was clamped at each end between two loading points and a dynamic loading force was applied on the test specimen. This test was used to determine the fracture toughness of this material under static loading.
Results And Discussion
The results of the fracture toughness test are shown in Table 1. The fracture toughness of 1Cr17Ni7 was found to be 27 MPa-m1/2. This result is in accordance with other reports which found that the fracture toughness of 1Cr17Ni7 is similar to that of other austenitic stainless steels. The results also indicated that 1Cr17Ni7 had excellent fracture toughness under dynamic loading.
Conclusion
This study has shown that 1Cr17Ni7 has excellent fracture toughness under dynamic loading and is a well-suited material for applications requiring a combination of good formability and strength. The results obtained in this study were comparable to other reports and thus reinforced the conclusion that 1Cr17Ni7 is an excellent material for use in different application fields.
