Novel concepts in weld metal science: Role of gradients and composite structure
The effects of compositional and microstructural gradients on weld metal properties are being investigated. Crack propagation in solidified alloy structures is being characterized as to solidification orientation and the profile of the compositional variations. Cracking in both Cu-Ni single crystals and high alloy Fe-Cr-Ni alloys are being analyzed. Emphasis is shifted from a consideration of natural gradients, which in weldments and castings are a direct result of solidification induced coring and the thermal history, to an analysis of a new novel class of welds with artificially induced gradients. The composite modeling techniques are being applied to describe the effects of compositional and microstructural gradients on weld metal properties in alloys. This effort has been extended to the analysis of several new weld metal systems of interest for joining new materials. A specific system of interest utilizes composites which may consist of a soft weld metal with insoluble hard second phase particles. Special techniques to produce laboratory samples with microstructures which simulate the composition and microstructure gradients in solidified weld metal are used, along with appropriate mathematical models, to evaluate the properties of the composite weld metals. 10 refs., 7 figs.
- Research Organization:
- Colorado School of Mines, Golden, CO (USA). Center for Welding and Joining Research
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG02-87ER45308
- OSTI ID:
- 5947476
- Report Number(s):
- DOE/ER/45308-4; MT-CWR--091-005; ON: DE91009817
- Country of Publication:
- United States
- Language:
- English
Similar Records
Novel concepts in weld metal science: Role of gradients and composite structure. Annual technical progress report, January 1, 1991--December 31, 1991
Novel concepts in weld science: Role of gradients and composite structure
Related Subjects
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
COMPOSITE MATERIALS
COPPER ALLOYS
CRACK PROPAGATION
CREEP
CRYSTAL STRUCTURE
DOCUMENT TYPES
FUNCTIONS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
PARTITION FUNCTIONS
PHASE TRANSFORMATIONS
PROGRESS REPORT
SOLIDIFICATION
STAINLESS STEELS
STEELS
SURFACE PROPERTIES
SURFACE TENSION
WELDABILITY