Precipitation Hardening: An Educational Film

Author(s):  
E. Nembach ◽  
V. Ruth ◽  
K. Suzuki ◽  
M. Ichihara ◽  
S. Takeuchi
Author(s):  
D.M. Vanderwalker

Aluminum-lithium alloys have a low density and high strength to weight ratio. They are being developed for the aerospace industry.The high strength of Al-Li can be attributed to precipitation hardening. Unfortunately when aged, Al-Li aquires a low ductility and fracture toughness. The precipitate in Al-Li is part of a sequence SSSS → Al3Li → AlLi A description of the phases may be found in reference 1 . This paper is primarily concerned with the Al3Li phase. The addition of Zr to Al-Li is being explored to find the optimum in properties. Zirconium improves fracture toughness and inhibits recrystallization. This study is a comparision between two Al-Li-Zr alloys differing in Zr concentration.Al-2.99Li-0.17Zr(alloy A) and Al-2.99Li-0.67Zr (alloy B) were solutionized for one hour at 500oc followed by a water quench. The specimens were then aged at 150°C for 16 or 40 hours. The foils were punched into 3mm discs. The specimens were electropolished with a 1/3 nitric acid 2/3 methanol solution. The transmission electron microscopy was conducted on the JEM 200CX microscope.


1946 ◽  
Vol 2 (1) ◽  
pp. 100-101
Author(s):  
Arthur G. Coons

1947 ◽  
Vol 2 (4) ◽  
pp. 371-380
Author(s):  
F. Dean McClusky
Keyword(s):  

2015 ◽  
Vol 1 (2) ◽  
pp. 135-143 ◽  
Author(s):  
Laura Isabel Serna

This short essay sketches the career of Anita Uada Maris Boggs, cofounder of the Bureau of Commercial Education, a charitable organization that from the 1910s through the 1930s circulated a library of sponsored films. I argue that Boggs's absence from film historiography has been doubly determined: first by the relative invisibility of educational film, and second by ideologies of gender that obscured women's work in the film industry, broadly construed, behind that of their male collaborators.


Alloy Digest ◽  
1964 ◽  
Vol 13 (6) ◽  

Abstract UDIMET 41 is a vacuum induction melted precipitation hardening nickel-base alloy having outstanding room and elevated temperature properties. It possesses excellent corrosion and oxidation resistance. It is designed for highly stressed components operating in the 1400-1700 deg F temperature range. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on low and high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-92. Producer or source: Special Metals Inc..


Alloy Digest ◽  
1990 ◽  
Vol 39 (2) ◽  

Abstract ALLVAC 80A is an 80% Ni/20% Cr alloy which is strengthened by precipitation hardening through the addition of Ti and A1. It is produced by vacuum induction plus vacuum are remelting. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-379. Producer or source: Allvac Inc..


Alloy Digest ◽  
2007 ◽  
Vol 56 (2) ◽  

Abstract Durimphy is a maraging steel with 1724 MPa (250 ksi) tensile strength and a very high yield strength due to precipitation hardening. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: FE-140. Producer or source: Metalimphy Precision Alloys.


Alloy Digest ◽  
1996 ◽  
Vol 45 (7) ◽  

Abstract Hidurel 5 is a precipitation-hardening copper-nickel-silicon bronze alloy with high conductivity and strength, corrosion resistance to marine environments and hydrogen embrittlement, and good antifrictional properties. This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength as well as fracture toughness. It also includes information on machining. Filing Code: CU-607. Producer or source: Langley Alloys Ltd.


Alloy Digest ◽  
1976 ◽  
Vol 25 (3) ◽  

Abstract AMPCOLOY 83 is a wrought copper-base alloy containing nominally 1.8% beryllium. It offers good formability in the unhardened condition and can be strengthened by precipitation hardening. It has a combination of high strength and hardness, good ductility, good electrical and thermal conductivity, excellent resistance to wear and fatigue, and high resistance to general corrosion. Among its many uses are components for resistance welding, bushings and shafts. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-310. Producer or source: Ampco Metal Inc..


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