Cooling tensile properties

Hardness and Tensile Properties. Recall that an increased hardness was observed in the HAZ. This trend was opposite to that found in precipitation-hardened and/or cold-worked aluminum alloys, which exhibit a large drop in hardness in the HAZ due to overaging or recrystallization, respectively. The exact reason for the increase in HAZ hardness here is not known however, it may have resulted from cold working of the HAZ during FSW and/or from straining during cooling due to coefficient of thermal expansion differences between the a and 3... 

Samples were compression molded and slow cooled in air tensile properties were determined at a draw rate of 25.4mmmin percent crystallinity was determined by DSC at a heating rate of 10°Cmin crystal phase structures were determined by Raman internal mode technique (LAM) a, aj,/ nd Oj refer to fraction of chain units in the perfect crystals, interfacial region, and amorphous region, respectively of a lamella. 

Fig. 1. Effect of Mn content in Fe-Mn alloys on (a) phase transformations during continuous heating and cooling, (b) tensile properties, and (c) ductile-brittle transition temperatures [ ].

Effect of 2 h annealing (or stress relieving) temperature on room-temperature tensile properties of full hard (50% odd worked) tubing. With a room-temperature full hand strength of 999 MPa (145 ksl) UTS and 896 MPa (130 ksl) tensile yield strength. 15.8 mm (0.625 in.) OD X 0.96 mm (0.038 in.) wall 50% CW+anneal, 2 h in vacuum, vacuum cool to approximate 425 °C (800 °F), AC. 

TI-5AI-2.SSn Effect of cooling from p anneal on tensile properties... 

Air-cooled plate. Solution treated tensile properties of plate specimens air cooled or furnace cooled from various solution temperatures. Specimens were 25 mm (1 in.) plate solution treated 1 h, as 25 by 150 by 150 mm (1 by 6 by 6 in.) specimen blanks. Each data point is the average of... 

IMI 685 Effect of cooling rate on room-temperature tensile properties after aging ... 

Room-temperature tensile properties of forging solution heat treated 15 min, 815 °C (1500 °F), aircooled, plus aged 12h, 565 C (1050 F). air cooled... 

Bfect of raeasing amounts of cold work on the room-tempefalure tensile properties of aged alloy cold drawn as indicated plus aged for6h S480 °C 00 °F=) and air cooled. 

Tensile properties of oold rolled (50% reduction) Transage 129 alloy 1.5 mm (0.060 in.) sheet as solution annealed from 705 to 815 °C (1300 to 15(X) ° and fan air cooled. Final reduction of 50% unidirectional at room temperature. Note that the beta transus temperature is 720 °C (1325 F). 

Beta solution heat treatment followed by subsequent martensitic transformation tends to annihilate prior texture. For example, Transage 175 sheet that was unidirectionally cold rolled for the final 47% reduction and heat treated at 760 C (1400 °F), 1/2 h, fan air cooled, 480 °C (900 °F), 48 h, AC had tensile properties as follows ... 

Tensile properties at room temperatureforaTi-25AI-16Nb alloy lath structures as function of cooling rate (p) and equiaxed structures (a2 + P) as a function of primary, equiaxed o2 volume fraclion. 

Toughness is the energy a film can absorb before rupturing, and it is measured by the area under the stress-strain curve. Brittleness is the lack of toughness. Amorphous and semicrystalline polymers become brittle when cooled below their glass transition temperature. Tests for tensile properties are described in the ASTM D 882, for flexural strength in ASTM D 790, and for flexural modulus in ASTM D 790M. 

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