| Abstract: | The effect of minor boron(1.0%, mole fraction) addition on tensile properties of wrought Ti 47 2Mn 2Nb alloy was investigated within the temperature range from 77 K to 1 373 K and the strain rate range from 10 -5 s -1 to 10 -1 s -1 . It was found that the minor addition of boron effectively refines the nearly lamellar microstructure of the alloy, significantly improves its strength, as well as its ductility. Although to a less degree, below its brittle to ductile transition temperature (T BD ), it does not harm its strength above its T BD , and is therefore proved to be an potentially effective way to improve comprehensive properties of wrought TiAl alloy. The B addition was also found to produce no obvious change in the fracture mode except for the cases around T BD . |
