Effects Of The Flash Welding Process On Mechanical And Microstructural Properties Of Structural Steel Joints Assessed Using Dest

ASTM A529 carbon¿manganese steel angle specimens were joined by flash butt welding and the effects of varying process parameter settings on the resulting welds were investigated. The weld metal and heat affected zones were examined and tested using tensile testing, ultrasonic scanning, Rockwell hardness testing, optical microscopy, and scanning electron microscopy with energy dispersive spectroscopy in order to quantify the effect of process variables on weld quality. Statistical analysis of experimental tensile and ultrasonic scanning data highlighted the sensitivity of weld strength and the presence of weld zone inclusions and interfacial defects to the process factors of upset current, flashing time duration, and upset dimension. Subsequent microstructural analysis revealed various phases within the weld and heat affected zone, including acicular ferrite, Widmanstätten or side-plate ferrite, and grain boundary ferrite. Inspection of the fracture surfaces of multiple tensile specimens, with scanning electron microscopy, displayed evidence of brittle cleavage fracture within the weld zone for certain factor combinations. Test results also indicated that hardness was increased in the weld zone for all specimens, which can be attributed to the extensive deformation of the upset operation. The significance of weld process factor levels on microstructure, fracture characteristics, and weld zone strength was analyzed. The relationships between significant flash welding process variables and weld quality metrics as applied to ASTM A529-Grade 50 steel angle were formalized in empirical process models

The Ursinus Weekly, October 12, 1972

Freshman voters elect leaders • Senator George L. Murphy to speak at convocation - dedication ceremonies • Continued false alarms may bring restrictions • Messiah\u27s annual performance slated for December 7th • Student-teachers assignments presented to seniors • Editorial: The Weekly wants you! • Student from Sri-Lanka speaks to Socratic Club • Stenzler sculpture in review: A good show • ProTheatre presents: Albee\u27s American dream • Faculty portrait: Emilio Paul • Bear Gridders win first • Harriers return to winning ways; Roll over three opponents • Aggressive play leads to victory at Goucher games • Manning takes helm; Aggression made keyhttps://digitalcommons.ursinus.edu/weekly/1087/thumbnail.jp

The Ursinus Weekly, October 20, 1972

Frats select queens for 1972 Homecoming • Ursinus graduate awarded Nobel Prize for medicine • Homecoming, dedication and Founder\u27s Day scheduled Saturday • Bailey named to Bowl Committee • Elliott Pool makes splash for Ursinus community • Editorial: Thank you • S.F.A.R.C. Committee gets three new faces • Myrin Library opens new listening room • Fidler on the wax: Foghat • Churches near Collegeville area welcome Ursinus students • Ursinus admits 308 freshmen; Campus rumors unfounded • Butterflies are free in review • The State of our prisons: The Case at Graterford • Judo class on campus, Judoka anyone? • Harriers roll over Kings and Scranton; Big tests still ahead • Ursinus soccer; Fans love it? • Oh, that astro turf! • Bears tame Mules • The Olympic idea and ideal • Sports buffs\u27 cornerhttps://digitalcommons.ursinus.edu/weekly/1088/thumbnail.jp

The Ursinus Weekly, November 16, 1972

Counselor on campus • Altman, Kaplan, Clatworthy & Marek to sing in 1972 Messiah performance • Evangelical theologian to speak at forum • Fire danger extinguished • Counseling, courses, change highlight S.F.A.R.C. monthly meeting • Editorial: It could only happen in the United States • Answer to the suitcase college critics: Lock the suitcases or close the pens • Perversion abundant in new action film, Deliverance • Letters to the editor: Forum cards for dances; Righteous indignation • Director of ProTheatre casts Fantasticks • Ezra Pound, leader of modern poetry in Britain and America dies at age 87 • M.A.C. championships held; U.C. Harriers third • Gridders trample Trenton; Finish with 5-3 slate • Sports buffs\u27 corner • Soccer team plays wellhttps://digitalcommons.ursinus.edu/weekly/1092/thumbnail.jp

The Ursinus Weekly, November 9, 1972

Faculty approves a variety of curricular changes • U.C. faculty supports calendar revision; Continues investigating possibilities • Chess tournament picks college champ • Fall bids accepted by new frat members • Century II increasingly successful as funds continue pouring in • Editorial: Back to square one • Focus: Geoffrey Mann • On Dedication Day, 1972 • Ambassador of Dahomey visits Ursinus campus • Cavaliere\u27s art in Wismer: A superficial show • Professors & Spanish Club descend upon Philadelphia • Letters to the editor: Layout criticism; Suitcase college? • Harriers finish at 11-3; Championships next • Boyd\u27s Bearettes end with a bang • Booter D remains tough; Offense fails to produce • Gridders blast Dickinsonhttps://digitalcommons.ursinus.edu/weekly/1091/thumbnail.jp

The Ursinus Weekly, October 26, 1972

Union and Bomberger renovation progress • Twenty-four degrees presented on successful Founder\u27s Day • SFARC starts year; Discusses women\u27s rules • Powell crowned Homecoming queen • Pre-med Society cleans cobwebbed constitution • Editorials: To voters; Do unto others • Faculty portrait: Dr. Joyce Henry • Up to New York from down on the farm; or the Fine Arts class sees the Met • WRUC radio revives; Moves to T-G Gym • Dormitory decorations trophy kept for good (show) by Shreiner • Campus once again united by sorority songs, traditions • Bear eleven rips Swarthmore; Whatley\u27s warriors win 35-21 as Ursinus\u27 offense dominates • Bearettes crunch G-burg • What ever happened to Eleanor Frost Snell? • Garnet booters trip Bears • Sports buffs\u27 cornerhttps://digitalcommons.ursinus.edu/weekly/1089/thumbnail.jp

All optical nanoscale sensor

A composition comprising a nanoparticle and at least one adsorbate associated with the nanoparticle, wherein the adsorbate displays at least one chemically responsive optical property. A method comprising associating an adsorbate with a nanoparticle, wherein the nanoparticle comprises a shell surrounding a core material with a lower conductivity than the shell material and the adsorbate displays at least one chemically responsive optical property, and engineering the nanoparticle to enhance the optical property of the adsorbate. A method comprising determining an optical response of an adsorbate associated with a nanoparticle as a function of a chemical parameter, and parameterizing the optical response to produce a one-dimensional representation of at least a portion of a spectral window of the optical response in a high dimensional vector space