The present invention relates to a method of manufacturing a shape memory alloy with extended temperature history which is capable of controlling an operating temperature of a wire at a cold processing rate of 20% or more with a result of the operating temperature extendable by an amount of cold processing, and a manufactured TiNiNb shape memory wire can be used to produce a TiNiNb ring product for shielding an electromagnetic wave cover.;COPYRIGHT KIPO 2019
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