Method utilizing cold welding to prepare grain boundaries having different included angles

A method utilizing a cold welding to prepare grain boundaries having different included angles, comprising using a designing and manufacturing device;

• wherein
• the designing and manufacturing device comprises a support member, two bent members are arranged in the support member and arranged opposite each other,
• a first end of each of the two bent members is fixedly connected to the support member, a second end of a first bent member of the two bent members is fixedly connected to a first sample through a first fixing member, a second end of a second bent member of the two bent members is fixedly connected to a second sample through a second fixing member, the second end of the first bent member and the second end of the second bent member are away from the support member, and the first sample and the second sample are arranged corresponding to each other;
• each of the two bent members comprises a first metal sheet and a second metal sheet having different thermal expansion coefficients wherein the first metal sheet is fixedly attached to the second metal sheet, and each of the first fixing member and the second fixing member is fixedly connected to a respective one of the second metal sheets;
• and
• a distance between top ends of the two second metal sheets is 30 μm-50 μm;
• the method comprising:
• a. pre-machining the first sample and the second sample by machining bulk materials to form microcolumns;
• b. forming the first sample and the second sample by machining the microcolumns to form the first sample and the second sample after step a is finished;
• c. mounting the first sample and the second sample by fixing the first sample and the second sample on the two second metal sheets, respectively, after step b is finished;
• d. starting the cold welding by heating the first metal sheets and the second metal sheets after step c is finished, so that the first sample and the second sample are brought closer to each other;
• and
• e. starting a detection experiment by changing a heating temperature after step d is finished, and observing morphological changes of the first sample and the second sample.