PROCESSING OF ALPHA-BETA TITANIUM ALLOYS
    84.
    发明公开

    公开(公告)号:EP3380639A1

    公开(公告)日:2018-10-03

    申请号:EP16805686.9

    申请日:2016-11-18

    IPC分类号: C22C14/00 C22F1/18

    摘要: A method for increasing tensile strength of a cold workable alpha-beta titanium alloy comprises solution heat treating a cold workable alpha-beta titanium alloy in a temperature range of Tβ-106° C. to Tβ-72.2° C. for 15 minutes to 2 hours; cooling the alpha-beta titanium alloy at a cooling rate of at least 3000° C./minute; cold working the alpha-beta titanium alloy to impart an effective strain in the range of 5 percent to 35 percent in the alloy; and aging the alpha-beta titanium alloy in a temperature range of Tβ-669° C. to Tβ-517° C. for 1 to 8 hours. Fastener stock and fasteners including solution treated, quenched, cold worked, and aged alpha-beta titanium alloys are also disclosed.

    TITANIUM ALLOYS EXHIBITING RESISTANCE TO IMPACT OR SHOCK LOADING AND METHOD OF MAKING A PART THEREFROM

    公开(公告)号:EP3099833B1

    公开(公告)日:2018-06-27

    申请号:EP15703208.7

    申请日:2015-01-27

    IPC分类号: C22C14/00 C22F1/18

    摘要: Titanium alloys formed into a part or component used in applications where a key design criterion is the energy absorbed during deformation of the part when exposed to impact, explosive blast, and/or other forms of shock loading is described. The titanium alloys generally comprise a titanium base with added amounts of aluminum, an isomorphous beta stabilizing element such as vanadium, a eutectoid beta stabilizing element such as silicon and iron, and incidental impurities. The titanium alloys exhibit up to 70% or more improvement in ductility and up to a 16% improvement in ballistic impact resistance over a Ti-6Al-4V alloy, as well as absorbing up to 50% more energy than the Ti-6Al-4V alloy in Charpy impact tests. A method of forming a part that incorporates the titanium alloys and uses a combination of recycled materials and new materials is also described.