JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY vol.50 no.584 September 2009 ---CONTENTS--- Essay History Repeats Itself ? Junichi ENDOU 1(811) Lectures Extrusion of Magnesium Alloys Tsutomu MURAI 3(813) Extrusion of Multi-Layered Metals 　―Fabrication Process of Metal-Composites with Cold Extrusion― Sakae SAITO 8(818) Properties of Fatigue Strength on Supersonic Wave Tomoki MASUKO, Kunio KOKUBO, Hideki AOKI and Yuki HASHIMOTO 13(823) Testing Methods for Mechanical Properties of Plastics 　―Trends in International Standards, ISO and Japanese Industrial Standards, JIS― Kazuo NAKAYAMA 19(829) Reports Report on Winners of the Excellent Paper-Presentation Award 　in the 2009 Japanese Spring Conference for the Technology of Plasticity Organizing Committee of the Conference 25(835) Papers Development of Flexible Extrusion Process with Divided Dies for Producing 　Hollow Shaft with Helical Tooth Makoto NIKAWA, Mitsunobu SHIRAISHI, Kensuke KUROKI and Mitsuru YAMAZAKI 27(837) A Proposal and an Untouched Subject of Standardization of Impact Compression Test by 　Split Hopkinson Pressure Bar Technique 　―Study of Standardization of Impact Compression Test by Split Hopkinson 　　　Pressure Bar Technique with the Aid of Numerical Simulation 3― Yasuhisa SATO and Minoru YAMASHITA 32(842) Effects of Shape Ratio of Billet on Extruded Length and Extrusion Load 　in Forward Can-Backward Can Combined Extrusion Forging 　―Research on Cold Forward-Backward Combined Extrusion Forging of Aluminum Alloy �V― Eisuke MURAI, Munenori ONO, Yasuhisa TOZAWA, Yukihiko SAWAI, Takahiro KOJIMA and Shin-ichi HAMAYA 37(847) Effects of Shape Ratio of Billet on Extruded Length and Extrusion Load 　in Forward Rod-Backward Rod Combined Extrusion Forging 　―Research on Cold Forward-Backward Combined Extrusion Forging of Aluminum Alloy �W― Eisuke MURAI, Satoshi IKEDA, Munenori ONO and Shin-ichi HAMAYA 42(852) Press Forming of Porous Sintered Metal Fiber Sheets Nobuhiro KOGA, Chen Chou WANG, Masao KANEKO and Min Young JUN 47(857) Development of Head End Thickness Control Technology for Gripping 　Ultra High-Tensile-Strength Steel Strip in Tandem Hot Strip Mill Kazuaki HAKOMORI, Michio SUGAHARA, Yuji KUSUMOTO, Takashi OOTANI, Ryuro KURAHASHI and Manabu KIUCHI 52(862) Thin-Sheet-Metal Bending by Laser Peen Forming with Femtosecond Laser Yoshihiro SAGISAKA, Masayoshi KAMIYA, Minoru MATSUDA and Yukihiro OHTA 58(868) Development of CAE Analysis in Three-Roll-Type Ring Rolling 　―CAE Analysis of Ring Rolling �U― Morihiko NAKASAKI, Toshifusa NAKAMIZO, Ichiro TAKASU and Hiroshi UTSUNOMIYA 63(873) Copyright (C)1997-2009 JSTP. All Rights Reserved.