|
John Herbert Hollomon Jr.
John Herbert Hollomon Jr. (March 12, 1919 – May 8, 1985) was a noted American engineer and founding member of the National Academy of Engineering. Biography Hollomon was born in Norfolk, Virginia, and in 1946 received his D.Sc. from the Massachusetts Institute of Technology (MIT) in metallurgy. He then joined the General Electric laboratories in Schenectady, New York, where he eventually became general manager. In 1962, he was appointed first assistant secretary for science and technology at the United States Department of Commerce. In this role he established the Environmental Sciences Services Administration (later, the National Oceanic and Atmospheric Administration), the Commerce Technical Advisory Board, and the State Technical Services program. He served for part of 1967 as acting under secretary of commerce, but left government for the University of Oklahoma where he served one year as president-designate and two as President. In 1970, Hollomon returned to MIT as con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solvay Conference 1951 G
Solvay may refer to: Companies and organizations * Solvay Brussels School of Economics and Management, Brussels, Belgium * Solvay Conference, founded by Ernest Solvay, deals with open questions in physics and chemistry * Solvay Indupa, an Argentine petrochemical company formerly owned by Solvay * Solvay Institute of Sociology, Brussels, Belgium, part of the Université Libre de Bruxelles * Solvay Process Company (1880–1985), a former U.S. company that employed the Solvay process * Solvay Public Library, on the National Register of Historic Places * Solvay S.A., an international chemicals and plastics company founded by Ernest Solvay Places * Solvay Castle, La Hulpe, Belgium * Solvay Hut, on the Matterhorn * Hôtel Solvay, a town house in Brussels, Belgium * Solvay, New York, a village * Solvay Mountains, Brabant Island, off the coast of Antarctica People * Ernest Solvay (1838–1922), Belgian chemist, inventor of the Solvay process * Lucien Solvay (1851–1950), Belgian jou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hollomon–Jaffe Parameter
The Hollomon–Jaffe parameter (HP), also generally known as the Larson–Miller parameter, describes the effect of a heat treatment at a temperature for a certain time. This parameter is especially used to describe the tempering of steels, so that it is also called tempering parameter. Effect The effect of the heat treatment depends on its temperature and its time. The same effect can be achieved with a low temperature and a long holding time, or with a higher temperature and a short holding time. Formula In the Hollomon–Jaffe parameter, this exchangeability of time and temperature can be described by the following formula: :H_p = \frac \cdot (C + \log(t)) This formula is not consistent concerning the units; the parameters must be entered in a certain manner. ''T'' is in degrees Celsius. The argument of the logarithmic function has the unit hours. ''C'' is a parameter unique to the material used. The Hollomon parameter itself is unitless A dimensionless quantity (also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1919 Births
Events January * January 1 ** The Czechoslovak Legions occupy much of the self-proclaimed "free city" of Pressburg (now Bratislava), enforcing its incorporation into the new republic of Czechoslovakia. ** HMY ''Iolaire'' sinks off the coast of the Hebrides; 201 people, mostly servicemen returning home to Lewis and Harris, are killed. * January 2– 22 – Russian Civil War: The Red Army's Caspian-Caucasian Front begins the Northern Caucasus Operation against the White Army, but fails to make progress. * January 3 – The Faisal–Weizmann Agreement is signed by Emir Faisal (representing the Arab Kingdom of Hejaz) and Zionist leader Chaim Weizmann, for Arab–Jewish cooperation in the development of a Jewish homeland in Palestine, and an Arab nation in a large part of the Middle East. * January 5 – In Germany: ** Spartacist uprising in Berlin: The Marxist Spartacus League, with the newly formed Communist Party of Germany and the Independent Social De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Presidents Of The University Of Oklahoma
President most commonly refers to: *President (corporate title) *President (education), a leader of a college or university *President (government title) President may also refer to: Automobiles * Nissan President, a 1966–2010 Japanese full-size sedan * Studebaker President, a 1926–1942 American full-size sedan * VinFast President, a 2020–present Vietnamese mid-size SUV Film and television *''Præsidenten'', a 1919 Danish silent film directed by Carl Theodor Dreyer * ''The President'' (1928 film), a German silent drama * ''President'' (1937 film), an Indian film * ''The President'' (1961 film) * ''The Presidents'' (film), a 2005 documentary * ''The President'' (2014 film) * ''The President'' (South Korean TV series), a 2010 South Korean television series * ''The President'' (Palestinian TV series), a 2013 Palestinian reality television show *''The President Show'', a 2017 Comedy Central political satirical parody sitcom Music *The Presidents (American soul band) *The P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Founding Members Of The United States National Academy Of Engineering
{{disambiguation ...
Founding may refer to: * The formation of a corporation, government, or other organization * The laying of a building's Foundation * The casting of materials in a mold See also * Foundation (other) * Incorporation (other) Incorporation may refer to: * Incorporation (business), the creation of a corporation * Incorporation of a place, creation of municipal corporation such as a city or county * Incorporation (academic), awarding a degree based on the student having ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul F
Paul may refer to: *Paul (given name), a given name (includes a list of people with that name) *Paul (surname), a list of people People Christianity *Paul the Apostle (AD c.5–c.64/65), also known as Saul of Tarsus or Saint Paul, early Christian missionary and writer *Pope Paul (other), multiple Popes of the Roman Catholic Church *Saint Paul (other), multiple other people and locations named "Saint Paul" Roman and Byzantine empire *Lucius Aemilius Paullus Macedonicus (c. 229 BC – 160 BC), Roman general *Julius Paulus Prudentissimus (), Roman jurist *Paulus Catena (died 362), Roman notary *Paulus Alexandrinus (4th century), Hellenistic astrologer *Paul of Aegina or Paulus Aegineta (625–690), Greek surgeon Royals *Paul I of Russia (1754–1801), Tsar of Russia *Paul of Greece (1901–1964), King of Greece Other people *Paul the Deacon or Paulus Diaconus (c. 720 – c. 799), Italian Benedictine monk *Paul (father of Maurice), the father of Maurice, Byzan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Lynn Cross
George Lynn Cross (May 12, 1905 – December 31, 1998) was a botanist, writer, and the longest serving president of the University of OklahomaLevy, David W.,University of Oklahoma," Encyclopedia of Oklahoma History and Culture'' (accessed May 26, 2010). (1943 to 1968). After he was appointed president at the age of 38, Cross helped peacefully integrate the university; built and oversaw the most winning college football program of the 1950s; spearheaded the expansion of numerous academic programs and facilities; and then helped lead the university through the 1960s protest period.Pittman, Kitty," Encyclopedia of Oklahoma History and Culture'' (accessed May 26, 2010). After retiring as president, Cross wrote several books, the first of which, ''Blacks in White Colleges'', described his personal experiences during the constitutional desegregation litigation that arose almost immediately after he became the university's young president. Early life Cross was born to a poor family in W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Work Hardening
In materials science, work hardening, also known as strain hardening, is the strengthening of a metal or polymer by plastic deformation. Work hardening may be desirable, undesirable, or inconsequential, depending on the context. This strengthening occurs because of dislocation movements and dislocation generation within the crystal structure of the material. Many non-brittle metals with a reasonably high melting point as well as several polymers can be strengthened in this fashion. Alloys not amenable to heat treatment, including low-carbon steel, are often work-hardened. Some materials cannot be work-hardened at low temperatures, such as indium, however others can be strengthened only via work hardening, such as pure copper and aluminum. Undesirable work hardening An example of undesirable work hardening is during machining when early passes of a cutter inadvertently work-harden the workpiece surface, causing damage to the cutter during the later passes. Certain alloys are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strain Hardening Exponent
The strain hardening exponent (also called the strain hardening index), usually denoted n, a constant often used in calculations relating to stress–strain behavior in work hardening. It occurs in the formula known as Hollomon's equation (after John Herbert Hollomon Jr.) who originally posited it as \sigma=K\epsilon^nJ. H. Hollomon, Tensile deformation, Trans. AIME, vol. 162, (1945), pp. 268-290. where \sigma represents the applied true stress on the material, \epsilon is the true strain, and K is the strength coefficient. The value of the strain hardening exponent lies between 0 and 1, with a value of 0 implying a perfectly plastic solid and a value of 1 representing a perfectly elastic Elastic is a word often used to describe or identify certain types of elastomer, elastic used in garments or stretchable fabrics. Elastic may also refer to: Alternative name * Rubber band, ring-shaped band of rubber used to hold objects togeth ... solid. Most metals have an n-value betw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zener–Hollomon Parameter
In materials science, the Zener–Hollomon parameter, typically denoted as ''Z'', is used to relate changes in temperature or strain-rate to the stress-strain behavior of a material. It has been most extensively applied to the forming of steels at increased temperature, when creep is active.''Fire Safety Engineering'', J.A. Purkiss, 2007, 2nd ed. Butterworth-Heinemann. Oxford It is given by :Z= \dot \exp(Q/RT) where \dot is the strain rate, ''Q'' is the activation energy, ''R'' is the gas constant, and ''T'' is the temperature. The Zener–Hollomon parameter is also known as the temperature compensated strain rate, since the two are inversely proportional in the definition. It is named after Clarence Zener and John Herbert Hollomon, Jr. who established the formula based on the stress-strain behavior in steel. When plastically deforming a material, the flow stress depends heavily on both the strain-rate and temperature. During forming processes, ''Z'' may help determine appr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boston University
Boston University (BU) is a private research university in Boston, Massachusetts. The university is nonsectarian, but has a historical affiliation with the United Methodist Church. It was founded in 1839 by Methodists with its original campus in Newbury, Vermont, before moving to Boston in 1867. The university now has more than 4,000 faculty members and nearly 34,000 students, and is one of Boston's largest employers. It offers bachelor's degrees, master's degrees, doctorates, and medical, dental, business, and law degrees through 17 schools and colleges on three urban campuses. The main campus is situated along the Charles River in Boston's Fenway-Kenmore and Allston, Massachusetts, Allston neighborhoods, while the Boston University Medical Campus is located in Boston's South End, Boston, South End neighborhood. The Fenway campus houses the Wheelock College of Education and Human Development, formerly Wheelock College, which merged with BU in 2018. BU is a member of the Bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
