HEAT RECOVERABLE ALLOY

• US 3,753,700 A
• Filed: 07/02/1970
• Issued: 08/21/1973
• Est. Priority Date: 07/02/1970
• Status: Expired due to Term

• Current Assignee: Jei Y. Choi, John D. Harrison, Peter R. Marchant
• Original Assignee: Jei Y. Choi, John D. Harrison, Peter R. Marchant
• Inventors: Harrison, John D., Choi, Jei Y., Marchant, Peter R.
• Primary Examiner(s): Dean, Richard O.
• Application Number:
  US05/052,112
• Time in Patent Office: 1,146 Days
• Field of Search: 75/170,175.5,134F,122 148/32,32.5
• US Class Current: 148/402
• CPC Class Codes: C22C 19/007 with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
• CPC Class Codes: C22F 1/006 Resulting in heat recoverable alloys with a memory effect

Abstract

An alloy capable of having the property of heat recoverability imparted thereto comprising 49.1 to 50.2 atomic percent of titanium, 2.1 to 4.7 atomic percent of iron and the remainder nickel.

Claims

2. A titanium, nickel and iron alloy within an area defined on a titanium, nickel and iron ternary phase diagram by a quadrilateral with its first corner at 49.1 atomic percent titanium, 47.3 atomic percent nickel and 3.6 atomic percent iron;

its second corner at 49.1 atomic percent titanium, 48.8 atomic percent nickel and 2.1 atomic percent iron;

its third corner at 50.2 atomic percent titanium, 46.8 atomic percent nickel and 3.0 atomic percent iron; and

its fourth corner at 50.2 atomic percent titanium, 45.1 atomic percent nickel and 4.7 atomic percent iron, the martensitic transformation temperature of said alloy being such as to permit impartation of heat recoverability to an object formed thereof at a temperature above the boiling point of liquid nitrogen.