Nickel titanium, also known as Nitinol, is a metal alloy of nickel and titanium, where the two elements are present in roughly equal atomic percentages. Different alloys are named according to the weight percentage of nickel, e.g. Nitinol 55 and Nitinol 60. It exhibits the shape memory effect and superelasticity at different temperatures. Nitinol alloys exhibit two closely related and unique properties: the shape memory effect and superelasticity (also called pseudoelasticity). Shape memory is the ability of nitinol to undergo deformation at one temperature, stay in its deformed shape when the external force is removed, then recover its original, undeformed shape upon heating above its "transformation temperature". Superelasticity is the ability for the metal to undergo large deformations and immediately return to its undeformed shape upon removal of the external load. Nitinol can deform 10-30 times as much as ordinary metals and return to its original shape. Whether nitinol behaves with the shape memory effect or superelasticity depends on whether it is above the transformation temperature of the specific alloy. Below the transformation temperature it exhibits the shape memory effect, and above that temperature it behaves superelastically. Hi. 69 haha nice rbdhdbd bdbs

Theo James Walcott (born 16 March 1989) is an English professional footballer who plays as a forward for Southampton, on loan from fellow Premier League club Everton, and the English national team. Walcott is a product of the Southampton Academy and started his career with Southampton before joining Arsenal for £5 million in 2006. His speedy pace and ball crossing led his manager Arsène Wenger to deploy him on the wing for most of his career. Walcott has been played as a striker since the 2012–13 season when he was Arsenal's top scorer, and he has scored more than 100 goals for the club. On 30 May 2006, Walcott became England's youngest-ever senior football player, aged 17 years and 75 days. In December, he received the BBC Young Sports Personality of the Year award. On 6 September 2008, he made his first competitive start in a World Cup qualifier against Andorra, and in the following match against Croatia on 10 September he opened his senior international goals tally and became the youngest player in history to score a hat-trick for England. He represented England at the 2006 World Cup and Euro 2012 and has 47 caps, scoring eight goals.
Theo James Walcott (born 16 March 1989) is an English professional footballer who plays as a forward for Southampton, on loan from fellow Premier League club Everton, and the English national team. Walcott is a product of the Southampton Academy and started his career with Southampton before joining Arsenal for £5 million in 2006. His speedy pace and ball crossing led his manager Arsène Wenger to deploy him on the wing for most of his career. Walcott has been played as a striker since the 2012–13 season when he was Arsenal's top scorer, and he has scored more than 100 goals for the club.

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