Mechanical Property Of Amorphous Alloy Fe₇₈Si₉B₁₃

Amorphous alloys have the structure features of long-range disorderly and short-range orderly; therefore they have excellent mechanics performances: high intensity and high hardness. Also they have high ductility. With the development of Chinese spaceflight, we need structures with high-intensity and high resistance to abrasion urgently and amorphous alloys will play their strong points. This article will take the amorphous strip Fe78Si9B13 as a example, uses AFM, DSC, XRD, SEM and other analytical testing techniques to study the amorphous material′s patterns, structures and initial crystallization. Through the tests of micro hardness, tensile, bulging and simulation using finite element method(FEM), this article has studied the amorphous material′s mechanics performance of hardness, brittleness, intensity, tensile and shaping performance etc.Through the experiment of isothermal annealing and isochronal annealing, this paper studied how the micro hardness of amorphous alloy Fe78Si9B13 change with temperature and annealing time. The results show that the micro hardness decline then rise and then decline with the rise of temperature; In low-temperature anneal, the micro hardness rise and then decline with the time being longer; In high-temperature anneal, the micro hardness rise all the time until to equilibrium. Different structures with different anneal processes were studied through XRD test; Introduce free volume models to analyze the anneal brittleness of amorphous alloy Fe78Si9B13.Through normal atmosphere temperature tensile test, this paper has measured the Young′s modulus and tensile strength of amorphous alloy Fe78Si9B13; Through high-temperature tensile test, have done study of how different temperatures and different rates of tensile affect the yield strength, elongation percentage and fracture strength of amorphous alloy Fe78Si9B13. Introduce the theory of crystallization dispersion strengthening to explain the performance parameters changes in the tensile test; observed the fracture texture of high-temperature tensile Using SEM.Do deforming test to Fe78Si9B13 amorphous alloy under complex stress and...