Caracterización de la tenacidad de fractura bajo la norma ASTM E 399-08 (PROBETA SENB), en aceros AISI-SAE 5160 H, utilizado en fabricación de ballestas
Cargando...
Archivos
Autores
Director
Tipo de contenido
Document language:
Español
Fecha
Título de la revista
ISSN de la revista
Título del volumen
Documentos PDF
Resumen
La fractura de materiales de ingeniería es casi siempre un hecho indeseable por varias razones, tales como la seguridad de vidas humanas, pérdidas económicas y la interferencia con la disponibilidad de productos y servicios. La industria automotriz ha estado siempre a la vanguardia en investigación ya que el mercado cada vez es más competido y exige productos de confiabilidad y de bajo costo. Los fabricantes y usuarios de ballestas desean buen desempeño, durabilidad y una reducción en el peso ya que esto se refleja en el consumo de combustible, por lo cual es más competitivo fabricar ballestas que ofrezcan la mayor tolerancia al daño posible, y con una alta tenacidad de fractura se asegura una mayor vida útil de las ballestas ante la presencia de discontinuidades. / Abstract. This project evaluates the behavior of fracture toughness in specimens of AISISAE 5160H steel used in the manufacture of automotive leaf spring. Specimens from four suppliers were subjected to quenched and tempered from seven different temperatures. The specimens were precracking in fatigue machine and subject to fracture toughness test in SENB settings, creating fracture surfaces, which were classified and inspected macroscopically (to simple view and in stereoscopic) and microscopic (scanning electron microscope-SEM). The material was characterized by chemical analysis, hardness and metallography. Ruled in Standard E399-08 was selected the type of specimen, was determined the precracking assembly and the fracture toughness was calculated in terms of Jtotal and Jcritical. With the development of this project found that the tempered temperature influenced the fracture toughness and was evident that one of the providers had a strong performance at lower fracture toughness than the other three suppliers. (Texto tomado de la fuente)
Abstract
This project evaluates the behavior of fracture toughness in specimens of AISI-
SAE 5160H steel used in the manufacture of automotive leaf spring. Specimens
from four suppliers were subjected to quenched and tempered from seven different
temperatures. The specimens were precracking in fatigue machine and subject to
fracture toughness test in SENB settings, creating fracture surfaces, which were
classified and inspected macroscopically (to simple view and in stereoscopic) and
microscopic (scanning electron microscope-SEM). The material was characterized
by chemical analysis, hardness and metallography. Ruled in Standard E399-08
was selected the type of specimen, was determined the precracking assembly and
the fracture toughness was calculated in terms of J total and J critical. With the
development of this project found that the tempered temperature influenced the
fracture toughness and was evident that one of the providers had a strong
performance at lower fracture toughness than the other three suppliers
Palabras clave propuestas
Descripción
ilustraciones, diagramas, fotografías