Graduate Thesis Or Dissertation

 

Percussion welding force, temperature and time relationships for welding 6061-T6 aluminum Público Deposited

Conteúdo disponível para baixar

Baixar PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/9z903341j

Descriptions

Attribute NameValues
Creator
Abstract
  • The force, temperature, and time relationships were investigated by using oscilloscope measurement techniques. Force was measured using a strain gage and the dynamic response recorded with a polaroid oscilloscope camera. Temperature was measured with a tungsten-rhenium thermocouple and recorded in the same manner. Residual stress measurements were made to determine an approximate temperature gradient of the weld zone. Tensile strength was used for determining the quality of the weld. All relationships were displayed using tensile strength as the dependent variable. An exponentially-shaped drop shaft was designed to control the force characteristics. No force wave-reflections were observed. The design criteria were high damping, smooth transitions, and coupling to the air. Process variables were reduced to allow observation of the force, time, and temperature relationships. The magnetic field, due to the current carrying leads, was a major factor in causing unsymmetrical arc formation and was reduced by shielding. Resistance of the circuit was controlled by providing bolted connections and using stainless steel strips for the varlable resistance element. The voltage and capacitance parameters were maintained at one setting in order to eliminate their effect. Oxide Iayers were not controlled but the studs and plates were cleaned of grease and films. Metallurgical relationships are discussed but not displayed. Cracking in the weld pone exists in some cases and overaging has been observed. These adverse metallurgical effects usually accompany a thick weld zone.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Declaração de direitos
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
Replaces

Relações

Parents:

This work has no parents.

Em Collection:

Itens