Strength and fracture of two-phase alloys: a comparison of two alloy systems

doi:10.2172/5799194

Abstract

The functional roles of the hard and soft constituents in the deformation and fracture of two-phase alloys are discussed on the basis of two commercially important alloy systems, namely spheroidized carbon steels and cemented carbides, WC-Co. A modified rule of mixtures provides a structural approach to the yield and flow strength. Consideration of the fracture toughness is attempted by means of a phenomenological modelling of the fracture process on the microscale. While there are large differences in properties between the two alloys, the deformation and fracture processes show broad smilarities which are associated with the features of the interaction between constituents common to both alloys.

J/sub Ic/ fracture toughness of ferritic DCI (ductile cast iron) alloys: A comparison of two versions of ASTM E 813

Salzbrenner, R. May 1989

The fracture toughness of several ductile cast iron (DCI) alloys has been calculated according to two versions of the ASTM Standard covering the determination of J/sub Ic/. The original version (ASTM E 813-81) had previously been used to establish the relationship between ferritic DCI alloys and the graphite nodule spacing. The J/sub Ic/ values were recalculated by the methods of the revised version of the ASTM Standard (ASME 813-87), and were found to be 5 to 8% higher than those determined by the original standard. A linear regression analysis was used to reaffirm that the fracture toughness is directly relatedmore »« less
PROGRESS REPORT. PART I. STRUCTURE AND PROPERTIES OF TWO-PHASE ALLOYS. PART II. A COMBINED MACROSCOPIC AND MICROSCOPIC APPROACH TO THE FRACTURE OF DUCTILE METALS

Drucker, D.C. ; Gurland, J. March 1964

Investigations were made on the elastic moduli of Al--Si systems over a wide range of compositions and of residual temperature stresses as a function of composition from 5 to 90% Si. Consistent results on elastic moduli were obtained from compositions with 5, l1, 20, and 30% Si by volume. However, the elastic modulus of the 40% Si alloy is abruptly different from that of the previous a1loy in the series. Temperature stresses for Al--Si alloys are hydrostatically compressive in the dispersed Si particles of Al-rich compositions, but change gradually to become predominantly tensile in Si-rich alloys. X-ray diffraction lines frommore »« less
FRACTURE OF Al--Al$sub 2$O$sub 3$ ALLOYS: FRACTURE ANALYSIS OF THE COMMERCIAL SAP-TYPE ALLOY XAP-001.

Harman, D.G. ; Nolan, T.A. January 1967
DOI: 10.2172/4348309

Full Text Available
I. THE DETERMINATION OF THE NIOBIUM-RICH REGION OF THE TERNARY PHASE DIAGRAM, NIOBIUM--ALUMINUM--ZIRCONIUM. II. PHASE EQUILIBRIA OF THE NIOBIUM--TUNGSTEN--HAFNIUM AND NIOBIUM--TUNGSTEN-ZIRCONIUM ALLOY SYSTEMS. III. STUDIES OF THE EFFECT OF INTERSTITIAL ADDITION ON THE PHASE EQUILIBRIA OF THE NIOBIUM-RICH REGION OF THE NIOBIUM--TUNGSTEN--HAFNIUM AND NIOBIUM--TUNGSTEN--ZIRCONIUM ALLOY SYSTEMS. Summary Report.

Yamamoto, A.S. January 1967
COMPARISON OF THE TRADITIONAL STRENGTH OF MATERIALS APPROACH TO DESIGN WITH THE FRACTURE MECHANICS APPROACH

Z. Ceylan April 2002

The objective of this activity is to show that the use of the traditional strength of materials approach to the drip shield and the waste package (WP) designs is bounding and appropriate when compared to the fracture mechanics approach. The scope of this activity is limited to determining the failure assessment diagrams for the two materials at issue: Ti-7 and Alloy 22. This calculation is intended for use in support of the license application design of the drip shield and the WP. This activity is associated with the drip shield and the WP designs. The activity evaluation for work packagemore »« less
DOI: 10.2172/888849

Full Text Available

Title: Strength and fracture of two-phase alloys: a comparison of two alloy systems

Abstract

Citation Formats

J/sub Ic/ fracture toughness of ferritic DCI (ductile cast iron) alloys: A comparison of two versions of ASTM E 813

PROGRESS REPORT. PART I. STRUCTURE AND PROPERTIES OF TWO-PHASE ALLOYS. PART II. A COMBINED MACROSCOPIC AND MICROSCOPIC APPROACH TO THE FRACTURE OF DUCTILE METALS

FRACTURE OF Al--Al$sub 2$O$sub 3$ ALLOYS: FRACTURE ANALYSIS OF THE COMMERCIAL SAP-TYPE ALLOY XAP-001.

COMPARISON OF THE TRADITIONAL STRENGTH OF MATERIALS APPROACH TO DESIGN WITH THE FRACTURE MECHANICS APPROACH