Method for imparting improved fatigue strength to wire made of shape memory alloys, and medical devices made from such wire专利检索- 线的拉紧专利检索查询-专利查询网

Method for imparting improved fatigue strength to wire made of shape memory alloys, and medical devices made from such wire
申请号	US15056514	申请日	2016-02-29	公开(公告)号	US10041151B2	公开(公告)日	2018-08-07
申请人	W. L. Gore & Associates, Inc.;			发明人	Jeremy E. Schaffer;
摘要	Wire products, such as round and flat wire, strands, cables, and tubing, are made from a shape memory material in which inherent defects within the material are isolated from the bulk material phase of the material within one or more stabilized material phases, such that the wire product demonstrates improved fatigue resistance. In one application, a method of mechanical conditioning in accordance with the present disclosure isolates inherent defects in nickel-titanium or NiTi materials in fields of a secondary material phase that are resistant to crack initiation and/or propagation, such as a martensite phase, while the remainder of the surrounding defect-free material remains in a primary or parent material phase, such as an austenite phase, whereby the overall superelastic nature of the material is preserved.
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